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英语周刊第28期
在线英语听力室 (1970-01-01)  字体: [ ]  
本 期 目 录 :

1.英语听力-经典教程 最新精选
2.美文欣赏-爱情
3.想笑就笑-喜欢炸鸡
4.双语故事-格林童话:特鲁得太太
5.生活英语-脱离困境Out of the woods 你会用了吗?
6.科普知识-什么叫“蓝牙”Bluetooth
7.体育英语-我在学校学过英语
8.双语诗歌-天使之吻
9.英文演讲-美国总统布什在清华大学的演讲
10.学习技巧-新东方背诵50篇46-50

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听英文歌曲解析歌词

初级商务英语听力2006

初级商务英语听力2007


美文欣赏-爱情

               Love 爱情

I love you not because of who you are,but because of who I am when I am with you.

我爱你,不是因为你是一个怎样的人,而是因为我喜欢与你在一起时的感觉。

No man or woman is worth your tears,and the one who is ,won't make you cry.

没有人值得你流泪,值得让你这么做的人不会让你哭泣。

The worst way to miss someone is to be sitting right beside them knowing you can't have them.

失去某人,最糟糕的莫过于,他近在身旁,却犹如远在天边。

Never frown,even when you are sad,because you never know who is falling in love with your smile.

纵然伤心,也不要悉眉不展,因为你不知是谁会爱上你的笑容。

To the world you may be one person,but to one person you may be the world.

对于世界而言,你是一个人;但是对于某人,你是他的整个世界。

Don't waste your time on a man/woman,who isn't willing to waste their time on you.

不要为那些不愿在你身上花费时间的人而浪费你的时间。

Just because someone doesn't love you the way you want them to,doesn't mean they don't love you with all they have.

爱你的人如果没有按你所希望的方式爱你,那并不代表他们没有全心全意地爱你。

Don't try to hard,the best things come when you least expect them to.

不要着急,最好的总会在最不经意的时候出现。

Maybe God wants us to meet a few wrong people before meeting the right one,so that when we finally meet the person,we will know how to be grateful.

在遇到梦中人之前,上天也许会安排我们先遇到别人;在我们终于遇见心仪的人时,便应当心存感激。

Don't cry because it is over,smile because it happened.

不要因为结束而哭泣,微笑吧,为你的曾经拥有。

                            更多内容


想笑就笑-喜欢炸鸡

  In class the teacher showed pictures of various birds. Then he asked one of the students, "What kind of bird do you like best, Jack?"

  Jack thought a moment, then answered, "Fried chicken, sir."

  中文:

   

  老师在课堂上向学生们展示了各种各样的鸟的照片。然后他问其中一名学生,"杰克,你最喜欢哪种鸟儿啊?"

  杰克想了想,回答,"炸鸡,老师。"

   更多内容


双语故事-格林童话:特鲁得太太

               Frau Trude

                 Jacob and Wilhelm Grimm

  Once upon a time there was a small girl who was strong willed and forward, and whenever her parents said anything to her, she disobeyed them. How could anything go well with her?

  One day she said to her parents: "I have heard so much about Frau Trude. Someday I want to go to her place. People say such amazing things are seen there, and such strange things happen there, that I have become very curious.

  Her parents strictly forbade her, saying: "Frau Trude is a wicked woman who commits godless acts. If you go there, you will no longer be our child.

  But the girl paid no attention to her parents and went to Frau Trude's place anyway.

  When she arrived there, Frau Trude asked: "Why are you so pale?"

  "Oh," she answered, trembling all over, "I saw something that frightened me."

  "What did you see?"

  "I saw a black man on your steps."

  "That was a charcoal burner."

  "Then I saw a green man."

  "That was a huntsman."

  "Then I saw a blood-red man."

  "That was a butcher."

  "Oh, Frau Trude, it frightened me when I looked through your window and could not see you, but instead saw the devil with a head of fire."

  "Aha!" she said. "So you saw the witch properly outfitted. I have been waiting for you and wanting you for a long time. Light the way for me now!"

  With that she turned to girl into a block of wood and threw it into the fire. When it was thoroughly aglow she sat down next to it, and warmed herself by it, saying: "It gives such a bright light!"

  从前,有个又固执好奇心又强的小姑娘,无论她父母要她干甚么她总是不服从。这样的孩子会有甚么好结果呢?

  有一天她问父母:「我总听人们说起特鲁得太太,说她的一切都与众不同,她家里尽是些希奇古怪的东西。我太好奇了,哪天我一定得去看看。」她父母坚决反对,说:「特鲁得是个坏女人,尽干坏事。你要是去了就不是我们的孩子了。」可是姑娘并没因父母的阻止而回心转意。当她来到特鲁得太太家时,特鲁得问她:「你的脸色怎么这么苍白啊?」「唉呀,」她浑身发抖地回答说,「我被见到的那些东西吓坏了。」「你看到什么了?」「我在台阶上看到一个黑色的人。」「那是烧炭的。」「后来看到一个绿色的人。」「那是猎人。」「后来还看到一个血红血红的人。」「那是屠夫。」「唉呀,特鲁得太太,我从窗口望进来,看到的不是你,而是火头魔鬼本人。我不会看错的,真吓死了!」

  「哦!」特鲁得说,「看来你的确看到了穿着平常服饰的巫婆了。我早就想要你了,已等了这么久,你可以让我这儿亮一点呢。」说罢将姑娘变成了一段木头,扔进了火堆。木头熊熊燃烧起来,巫婆靠近火堆取暖,说:「它亮一阵子就会熄灭的。」

                               更多内容


生活英语-脱离困境Out of the woods 你会用了吗?

  有一年夏天与朋友一家去加拿大洛基山度假。大自然的美好风光让人陶醉,所有压力和烦恼都被抛至脑后,爬到半山腰,个个都累的气喘吁吁。

  于是,就地休息。朋友谈到他们拯救了濒临破裂的婚姻的感慨时,不禁深深地吸了口气,说: "I am out of the woods."

  听完这句话,我独自思忖了许久。"木材用完了?""从森林里走出来了?"好象都不是这些意思。

  回到营地, 问过先生,才明白,朋友所指是"脱离困境"的意思。那几天在山上,几乎时时与woods为伍,忘了它还有别的意思。

                              更多内容


科普知识-什么叫“蓝牙”Bluetooth

                What is Bluetooth?

  Bluetooth is a universal radio interface in the 2.45GHz frequency band that enables portable electronic devices to connect and communicate wirelessly via short-range, ad hoc networks. Each unit can simultaneously communicate with up to sever other units per piconet. Moreover, each unit can simultaneously belong to several piconets.

  What is Bluetooth Technology?

  Bluetooth technology which apart from Ericsson, has gained the support of Nokia, IBM, Toshiba, Intel and many other manufacturers eliminates the need for wires, cables and connectors for and between cordless or mobile phones, modems, headsets, PDAs, Computers, printers, projectors, local area networks, and so on, and paves the way for new and completely different devices and applications.

  Technology Characteristics

  1Ms/s symbol rate exploits maximum available channel bandwidth.

  Fast frequency hopping avoids interference.

  Adaptive output power minimizes interference.

  Short data packets maximize capacity during interference.

  Fast acknowledge allows low coding overhead for links.

  CVSD (Continuous Variable Slope Delta Modulation) voice coding enables operation at high bit- error rates.

  Flexible packet types supports wide application range.

  Air interface tailored to minimize current consumption.

  Basic Technical Information

  Based upon a small, high performance integrated radio transceiver, each of which is allocated a unique 48-bit address derived from the IEEE 802 standard.

  Operate in the unrestricted 2.45GHz ISM free band, Which is available globally although slight variation of location and width of band apply.

  Range set at 10m to optimize for target market of mobile and business user.

  Gross data rate 1Mbit/s with second generation plans to increase to 1Mbit/s.

  One-to-one connections allow maximum data transfer rate of 721kbit/s (3 voice channels).

  Uses packet switching protocol based on frequency hop scheme with 1600 hops/s to enable high performance in noisy radio environments. The entire available frequency spectrum is used with 79 hops of 1Mhz bandwidth, analogous to the IEEE 802.11 standard.

  Low power consumption longevity for battery powered devices. During data transfer the maximum current drain is 30mA. However, during pauses or at lower data rates will be lower.

  中文:

  蓝牙是一个频率为2.45GHz的通用无线电通信接口,它通过一个特殊的网络可以在各种便携设备之间建立起无线连接并进行短程通信。在一个微微网中,每个单元都能同时与其它各单元进行通信。而且,每一个单元可以同时属于几个微微网。

  什么是"蓝牙"技术?

  "蓝牙"技术最先是由爱立信开始研制的,现在已经得到了诺基亚、IBM、东芝、因特尔及许多其它相关制造厂家的支持。其目的是为了免除在无绳电话或移动电话、调制解调器、头套式送/受话器、PDAs、计算机、打印机、幻灯机、局域网等之间加装电线、电缆和连接器。而且,这种技术可以延伸到那些完全不同的新设备和新应用中去。

  "蓝牙"的技术特性

  以每秒1M个码元的字符速率传输,充分利用信道的最大有效带宽。

  快速跳频避免干扰。

  可变的电源输出使干扰减小到最小。

  采用短数据包传输增强抗干扰能力。

  快速确认允许有附加低速率的编码被发送到链路上。

  连续可变斜率增量调制的语音编码可以在高误码率的情况下正常工作。

  灵活的分组类型支持多种应用。

  无线电空中接口使电耗达到最小。

  "蓝牙"基本技术概要

  每一个小型、高性能、集成的无线电收发机都有IEEE 802标准所规定的一个唯一的48比特位地址。

  开放的2.45GHz ISM自由频段,全球都可以自由使用。

  10公里是最适于移动通信市场和商业用户的通信范围。

  总速率为1Mbit/s,计划下一代产品将达到2Mbit/s。

  点到点连接允许的最大数据传输速率为721kbit/s。

  在无线电噪声环境里,利用基于每秒1600跳跳频表的分组交换协议可以提高系统性能。以1Mhz带宽79跳来利用这个完整的可用频谱。这类似于IEEE 802.11标准。

  低电能的消耗。在备用模式下仅需0.3mA,这能延长那些使用电池供电设备的寿命。数据传送时电流的最大消耗为30mA。当暂停工作或低速传送数据时电流消耗更低。

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体育英语-我在学校学过英语

I learned English at school.

我在学校学过英语。

A: Your English is very good, Ping. Where did you learn it?

A: 你的英语非常好,平。你在哪里学的英语?

B: I learned it at school and at university. And by talking to lots of people. I

also read lots of newspapers, magazines and books.

B: 我在中小学和大学里学的。在跟别人的交谈中我也学到了很多,我还看报纸、杂志和书。

A: Well, it's excellent. It's much better than my Chinese!

A: 啊,太棒了。你的英语比我的中文好多了。

B: And I watch English programme on TV when I can. And movies on DVD. They all help me to speak English better.

B: 当我能行的时候我就看英语电视节目。还有利用DVD看英文电影。这些都有助于我把英语说得更好。

A: I wish I spoke Chinese as well as you speak English.

A: 我希望我的中文和你的英语说得一样好。

--------------------------------------------------------------------------------

Notes:

1. To praise someone's language ability, you can say: Your English is very good. 要赞扬某人的语言能力,你可以说:Your English is very good (你的英语非常好)

2. Remember how to ask where someone did something, using Where...e.g. Where did you learn English? 记住怎样问某人在何处做某事,用where...(在哪里...)。例如:where did you learn English? (你在哪里学的英语?)

                         更多内容


双语诗歌-天使之吻

          An Angel Kiss

An Angel kissed my tears away

today when I was sad.

I wasn't feeling quite myself

my day had been so bad.

I felt a warmth brush by me

that quickly dried my tears;

A gentle, kind, and loving touch

that seemed to hold me near.

Immediately, I felt so much better

and the day seemed brighter, too.

I guess that's just the way you feel

when an Angel comforts you.

           天使之吻

今天当我感到悲伤

天使吻干了我的泪水

我的生活是如此糟糕

感到自己迷失了方向

 

突然一个温暖的轻抚

迅速擦干了我的泪水

一个温柔、亲切而深情的抚摸

似乎将我拉近

我立刻感到好了许多

天气似乎更加明亮

我想天使安慰你的时候

你也会有同样的感觉

                          更多内容


英文演讲-美国总统布什在清华大学的演讲

President Bush:

  Vice President Hu, thank you for your words of welcome. I am grateful for your hospitality, and honored by this reception at one of China's great universities.

Tsinghua University was founded, with the support of America, to further the ties between our two nations. I know how important this place is to the Vice President, who earned his degree here and even more important, met his gracious wife Liu Yongqing here.

  I also thank the students here for this opportunity to meet with you, to talk a little bit about my country and answer some of your questions. The standards and reputation of this university are known around the world, and I know what an achievement it is to be here. My wife Laura and I have two daughters in college, one at Yale and the other at the University of Texas. We are proud of our daughters just like I am sure your parents are proud of you.

  My visit to China comes on an important anniversary. Thirty years ago this week, an American President arrived in China on a trip designed to end decades of estrangement and confront centuries of suspicion. President Richard Nixon showed the world that two vastly different governments could meet on the grounds of common interest, and in a spirit of mutual respect. As they left the airport that day, Premier Zhou Enlai said to President Nixon, ``Your handshake came over the vastest ocean in the world twenty-five years of no communication.''

  During the 30 years since, America and China have exchanged many handshakes of friendship and commerce. And as we have had more contact with each other, the citizens of our two countries have gradually learned more about each other.

  Once, America knew China only by its history as a great and enduring civilization. Today, we see a China that is still defined by noble traditions of family, scholarship, and honor. And we see a China that is becoming one of the most dynamic and creative societies in the world as demonstrated by all the knowledge and potential right here in this room.

  China is on a rising path, and America welcomes the emergence of a strong, peaceful, and prosperous China.

  As America learns more about China, I am concerned that the Chinese people do not always see a clear picture of my country. This happens for many reasons, some of them of our own making. Our movies and television shows often do not portray the values of the real America I know. Our successful businesses show the strength of American commerce, but the community spirit and contributions of those businesses are not always as visible as their monetary success. Some of the erroneous pictures of America are painted by others. My friend, the Ambassador to China, tells me that some Chinese textbooks talk of Americans ``bullying the weak and repressing the poor.'' Another Chinese textbook, published just last year, teaches that special agents of the FBI are used to ``repress the working people.''

  Neither of these is true and while the books may be leftovers from a previous era, they are misleading and harmful. In fact, Americans feel a special responsibility for the poor and the weak. Our government spends billions of dollars to provide health care and food and housing for those who cannot help themselves and even more important, many of our citizens contribute their own money and time to help those in need. American compassion stretches way beyond our borders. We are the number one provider of humanitarian aid to people in need throughout the world. As for the men and women of our FBI and law enforcement, they are themselves working people who devote their lives to fighting crime and corruption.

  My country certainly has its share of problems and faults; like most nations we're on a long journey toward achieving our own ideals of equality and justice. Yet there is a reason our nation shines as a beacon of hope and opportunity, a reason many throughout the world dream of coming to America.

  We are a free nation, where men and women have the opportunity to achieve their dreams. No matter your background or circumstance of birth, in America you can get a good education, start a business, raise a family, worship freely and help elect the leaders of your community and country. You can support the policies of our government, or you are free to openly disagree with them. Those who fear freedom sometimes argue it could lead to chaos, but it does not, because freedom means more than every man for himself.

  Liberty gives our citizens many rights, yet expects them to exercise important responsibilities. Our liberty is given direction and purpose by moral character, shaped in strong families, strong communities, and strong religious institutions and overseen by a strong and fair legal system.

  My country's greatest symbol to the world, the Statue of Liberty, was designed with great care. As you look closely, you will see that she is holding not one object, but two. In one hand is the familiar torch, the light of liberty. In the other is a book of law.

  We are a Nation of laws. Our courts are honest and independent. The President can't tell the courts how to rule and neither can any other member of the executive or legislative branch. Under our law, everyone stands equal. No one is above the law, and no one is beneath it.

  All political power in America is limited and temporary, and only given by a free vote of the people. We have a Constitution, now two centuries old, which limits and balances the powers of the three branches of our government: judicial, legislative and executive.

  Many of the values that guide our life in America are first shaped in our families, just as they are in your country. American Moms and Dads love their children and work hard and sacrifice for them, because we believe life can always be better for the next generation. In our families, we find love and learn responsibility and character.

  And many Americans voluntarily devote part of their lives to serving others. An amazing number nearly half of all adults in America volunteer time every week to make their communities better by mentoring children visiting the sick caring for the elderly and helping with a thousand other needs and causes. This is one of the great strengths of my country. People take responsibility for helping others without being told, motivated by their good hearts and often by their faith.

  America is a nation guided by faith. Someone once called us ``a nation with the soul of a church.'' Ninety-five percent of Americans say they believe in God, and I'm one of them.

  When I met with President Jiang Zemin in Shanghai a few months ago, I told him how faith has shaped my own life, and how faith contributes to the life of my country. Faith points to a moral law beyond man's law and calls us to duties higher than material gain. Freedom of religion is not something to be feared but to be welcomed, because faith gives us a moral core and teaches us to hold ourselves to high standards, to love and serve others, and to live responsible lives.

  If you travel across America, you will find people of many different ethic backgrounds and many different faiths. We are a varied country. We are home to 2.3 million Americans of Chinese ancestry, who can be found working in the offices of our biggest companies, serving in my own Cabinet, and skating for America at the Olympics. Every immigrant, by taking an oath of allegiance to our country, becomes just as much an American as the President of the United States. America shows that a society can be vast and varied, and yet still one country, commanding the allegiance and love of its people.

  All of these qualities of America were vividly displayed on a single day, September 11th, when terrorists attacked America. American policemen and firefighters, by the hundreds, ran into burning towers in the desperate hope of saving other lives. Volunteers came from everywhere to help with the rescue efforts. Americans donated blood, and gave money to help the families of victims. People went to prayer services all over America, and raised flags to show their pride and unity. None of this was ordered by the government; it happened spontaneously, by the initiative of a free people.

  Life in America shows that liberty, paired with law, is not to be feared. In a free society, diversity is not disorder. Debate is not strife. And dissent is not revolution. A free society trusts its citizens to seek greatness in themselves and their country.

  It was my honor to visit China in 1975, and a lot has changed in your country since then. China has made amazing progress in openness, and enterprise, and economic freedom. And this progress previews China's great potential.

  China has joined the World Trade Organization, and as you live up to its obligations, they will bring changes in China's legal system. A modern China will have a consistent rule of law to govern commerce and secure the rights of its people.

  The new China your generation is building will need the profound wisdom of your traditions. The lure of materialism challenges society in our country and in many successful countries. Your ancient ethic of personal and family responsibility will serve you well.

  Behind China's economic success today are talented, energetic people. In the near future, these same men and women will play a full and active role in your government. This university is not simply turning out specialists, it is preparing citizens. And citizens are not spectators in the affairs of their country. They are participants in its future.

  Change is coming. China is already having secret ballot and competitive elections at the local level. Nearly twenty years ago, Deng Xiaoping said that China would eventually expand democratic elections all the way to the national level and I look forward to that day.

  Tens of millions of Chinese today are relearning Buddhist, Taoist, and local religious traditions, or practicing Christianity, Islam, and other faiths. Regardless of where or how these believers worship, they are no threat to public order; in fact, they make good citizens. For centuries, this country had a tradition of religious tolerance. My prayer is that all persecution will end, so that all in China are free to gather and worship as they wish.

  All of these changes will lead to a stronger, more confident China a China that can astonish and enrich the world, a China that your generation will help create. This is one of the most exciting times in the history of your country a time when even the grandest hopes seem within your reach.

  My nation offers you our respect and our friendship. Six years from now, athletes from America and around the world will come to your country for the Olympic games. And I am confident they will find a China that is becoming a da guo, a leading nation, at peace with its people and at peace with the world.

  Thank you and now I look forward to answering some questions.

  胡副主席,非常感谢您的欢迎致辞,非常感谢您在这里接待我和我的夫人劳拉。我也看到我的助理赖斯女士,她曾经是斯德莫大学的校长,因此她回到校园是最适合不过的了。非常感谢各位对我的热情的接待,很荣幸能够来到中国,甚至是世界最伟大的一座学府之一,这所大学恰好是在美国的支持下成立的,成立的目标是为了推动我们两国间的关系。我也知道清华这所大学对于副主席先生有着十分重要的意义,他不仅在这里获得了学位,而且是在这里与他优雅的夫人相识的。我想同时,也感谢在座的各位学生给我这个机会跟大家见面,谈一谈我自己的国家,并且回答大家的一些问题。

  清华大学的治学标准和名声闻名于世,我也知道能考入这所大学本身是一个很大的成就,祝贺你们。

  我和我的太太有两个女儿,像你们一样正在上大学,有一个女儿上的是德州大学,一个女儿上的是耶鲁大学,他们是双胞胎。我们对我们的两个女儿倍感骄傲,我想你们的父母对你们的成就也是同样的引以为荣的。我这次访华恰逢一个重要的周年纪念日,副主席刚才也谈到了,三十年前这一周,一个美国的总统来到了中国,他的访华之旅目的是为了结束长达数十年的隔阂,和长达数百年的相互猜疑,本着相互利益,本着相互尊重的精神站在一起。那天他们离开机场的时候,周恩来总理对尼克松总统说了这样一番话,他说,你与我的握手越过了世界上最为辽阔的海洋,这个海洋就是互不交往的25年。自从那时以来,美国和中国已经握过多次的友谊之手和商业之手。

  随着我们两国间接触的日益频繁,我们两国的国民也逐渐地加深了对彼此的了解,这是非常非常重要的。曾经一度,美国人只知道中国是一个历史悠久的一个伟大的国家,有伟大的文明。今天,我们仍然看到中国奉行着重视家庭、学业和荣誉的优良的传统,同时,我们所看到的中国正日益成为世界上一个最富活力和最富创造力的社会之一,这一点最佳的验证便是在座诸位所具备的知识和潜力。中国正走在一个发展的道路上,而美国欢迎一个强大、和平与繁荣的中国的出现。我同美国人在更进一步了解中国的同时,也担心中国人不一定总是能够很清楚地看到我的国家的真实面貌,这里面有多种原因,其中有一些是我们自己造成的。我们的电影,还有电视节目,往往并没有全面反映出美国。我们成功的企业显示了美国商业的力量。但是我们的精神、我们的社区精神,还有我们相互对彼此的贡献往往并不像我们金钱方面的成功那样的显而易见。

  更为重要的是,我们许多的公民主动捐出自己的金钱,自己的时间来帮助有需求的人士。美国的同情心,同时也远远超越了我们自己的国界,在人道主义援助方面,我们居于世界首位,援助世界各地的人们。至于联邦调查局和执法界的工作人员,他们自己就是劳动人民的一员,他们献身于打击犯罪,打击腐败。

  我们有一部宪法,已经有二百年的历史,它限制并且平衡三个部门之间的权利,这三个部门就是司法、立法和行政机构,我是行政机构的一员,指导我们的很多的价值观是在家庭中陶冶形成的,就像在中国一样,美国的妈妈们,爸爸们疼爱他们的孩子,为他们辛勤地劳动,作出牺牲,因为我们相信,下一代的生活总会更好,在我们的家庭中,我们可以找到关爱,可以学习如何负起责任,如何陶冶人格。很多美国人都抽出时间为其他人服务,成年中的一半人每周都拿出时间,使得他们的社区办得更好,他们辅导儿童,探访病人,照顾老人,并且帮助做许许多多数不胜数的事情。这就是我的国家的一大优点。我们主动承担起责任,帮助他们,他们的原动力就是善良的心,还有他们的信仰。

  如果你去美国旅行的话,你会见到来自不同种族背景,有着不同信仰的人。我们是一个多元化、多姿多彩的国家,在那里有230万华人,他们在那里繁衍生息。在我们大公司的办公室里有华人工作,在美国政府中有华人工作,在奥林匹克比赛中代表美国参加滑冰比赛的也有华人。

  诸位,重视个人和家庭责任的古老道德传统将使诸位受益匪浅。在中国如今经济成功的背后,有着有活力的人才。在不久的将来,这些人无论是男是女,将在这个政府中发挥积极和全面的作用。清华大学它不仅在培养专家,它也是在培育公民。公民在他们国家的事务中不是袖手旁观者,他们是建设未来的参与者。

  所有的这些变化,将导致中国更加强大,更加有自信,这个中国将使世界瞩目,也使世界更加丰富。这个中国就是诸位这一代人所帮助创立的中国,现在在中国的历史上是一个非常令人振奋的时刻。此时此刻,就连最宏伟的梦想也似乎唾手可得。   我的国度,对中国提出尊敬和友谊,再过六年,来自美国和世界的运动员将到贵国来参加奥林匹克比赛,我坚信,他们能够见到的中国将是正在变成一个大国的中国,一个走在世界前沿的国家,一个与其人民无争,与世界和平相处的中国。

  谢谢诸位让我到此来演讲。下面欢迎大家提问。

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学习技巧-新东方背诵50篇46-50

46.Vision by

Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest, it is more important to see well that to develop an acute sense of smell. In the course of evolution members of the primate line have acquired large eyes while the snout has shrunk to give the eye an unimpeded view. Of mammals only humans and some primates enjoy color vision. The red flag is black to the bull. Horses live in a monochrome world .light visible to human eyes however occupies only a very narrow band in the whole electromagnetic spectrum. Ultraviolet rays are invisible to humans though ants and honeybees are sensitive to them. Humans though ants and honeybees are sensitive to them. Humans have no direct perception of infrared rays unlike the rattlesnake which has receptors tuned into wavelengths longer than 0.7 micron. The world would look eerily different if human eyes were sensitive to infrared radiation. Then instead of the darkness of night, we would be able to move easily in a strange shadowless world where objects glowed with varying degrees of intensity. But human eyes excel in other ways. They are in fact remarkably discerning in color gradation. The color sensitivity of normal human vision is rarely surpassed even by sophisticated technical devices.

47 Folk Cultures

A folk culture is a small isolated, cohesive, conservative, nearly self-sufficient group that is homogeneous in custom and race with a strong family or clan structure and highly developed rituals. Order is maintained through sanctions based in the religion or family and interpersonal. Relationships are strong. Tradition is paramount, and change comes infrequently and slowly. There is relatively little division of labor into specialized duties. Rather, each person is expected to perform a great variety of tasks, though duties may differ between the sexes. Most goods are handmade and subsistence economy prevails. Individualism is weakly developed in folk cultures as are social classes. Unaltered folk cultures no longer exist in industrialized countries such as the United States and Canada. Perhaps the nearest modern equivalent in Anglo America is the Amish, a German American farming sect that largely renounces the products and labor saving devices of

the industrial age. In Amish areas, horse drawn buggies still serve as a local transportation device and the faithful are not permitted to own automobiles. The Amish's central religious concept of Demut "humility", clearly reflects the weakness of individualism and social class so typical of folk cultures and there is a corresponding strength of Amish group identity. Rarely do the Amish marry outside their sect. The religion, a variety of the Mennonite faith, provides the principal mechanism for maintaining order.

By contrast a popular culture is a large heterogeneous group often highly individualistic and a pronounced many specialized professions. Secular institutions of control such as the police and army take the place of religion and family in maintaining order, and a money-based economy prevails. Because of these contrasts, "popular" may be viewed as clearly different from "folk". The popular is replacing the folk in industrialized countries and in many developing nations. Folk-made objects give way to their popular equivalent, usually because the popular item is more quickly or cheaply produced, is easier or time saving to use or leads more prestige to the owner.

                                       

48 Bacteria

Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bacteria are usually from two to four microns long, while rounded ones are generally one micron in diameter. Thus if you enlarged a rounded bacterium a thousand times, it would be just about the size of a pinhead. An adult human magnified by the same amount would be over a mile(1.6 kilometer) tall.

Even with an ordinary microscope, you must look closely to see bacteria. Using a magnification of 100 times, one finds that bacteria are barely visible as tiny rods or dots. One cannot make out anything of their structure. Using special stains, one can see that some bacteria have attached to them wavy-looking "hairs" called flagella. Others have only one flagellum. The flagella rotate, pushing the bacteria through the water. Many bacteria lack flagella and cannot move about by their own power, while others can glide along over surfaces by some little-understood mechanism.

From the bacteria point of view, the world is a very different place from what it is to humans. To a bacterium water is as thick as molasses is to us. Bacteria are so small that they are influenced by the movements of the chemical molecules around them. Bacteria under the microscope, even those with no flagella, often bounce about in the water. This is because they collide with the watery molecules and are pushed this way and that. Molecules move so rapidly that within a tenth of a second the molecules around a bacteria have all been replaced by new ones; even bacteria without flagella are thus constantly exposed to a changing environment.

49 Sleep

Sleet is part of a person's daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an average sleeper, your sleep cycle is as follows. When you fist drift off into slumber, your eyes will roll about a bit, you temperature will drop slightly, your muscles will relax, and your breathing well slow and become quite regular. Your brain waves slow and become quite regular. Your brain waves slow down a bit too, with the alpha rhythm of rather fast waves 1 sleep. For the next half hour or so, as you relax more and more, you will drift down through stage 2 and stage 3 sleep. The lower your stage of sleep. slower your brain waves will be. Then about 40to 69 minutes after you lose consciousness you will have reached the deepest sleep of all. Your brain will show the large slow waves that are known as the delta rhythm. This is stage 4 sleep.

You do not remain at this deep fourth stage all night long, but instead about 80 minutes after you fall into slumber, your brain activity level will increase again slightly. The delta rhythm will disappear, to be replaced by the activity pattern of brain waves. Your eyes will begin to dart around under your closed eyelids as if you were looking at something occurring in front of you. This period of rapid eye movement lasts for some 8 to 15 minutes and is called REM sleep. It is during REM sleep period, your body will soon relax again, your breathing will slip gently back from stage 1 to stage 4 sleep----only to rise once again to the surface of near consciousness some 80 minutes later.

50. Cells and Temperature  

Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only within a narrow range around 37C;a departure of a few degrees from this value seriously impairs their functioning. Even though cells can survive wider fluctuations the integrated actions of bodily systems are impaired. Other animals have a wider tolerance for changes of bodily temperature.

For centuries it has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. Ways of characterizing the difference have become more accurate and meaningful over time, but popular terminology still reflects the old division into "warm-blooded" and "cold-blooded" species; warm-blooded included mammals and birds whereas all other creatures were considered cold-blooded. As more species were studied, it became evident that this classification was inadequate. A fence lizard or a desert iguana-each cold-blooded----usually has a body temperature only a degree or two below that of humans and so is not cold. Therefore the next distinction was made between animals that maintain a constant body temperature, called home0therms, and those whose body temperature varies with their environments, called poikilotherms. But this classification also proved inadequate, because among mammals there are many that vary their body temperatures during hibernation. Furthermore, many invertebrates that live in the depths of the ocean never experience change in the depths of the ocean never experience change in the chill of the deep water, and their body temperatures remain constant.

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