[00:02.60]第14单元人造卫星
[00:05.20]Lesson 53 1 Dialogue
[00:08.28]第53课 1 对话
[00:11.36]Jane and Zhou Lan are in London.They are wondering what to do today.
[00:14.64]简和周兰在英国。她们今天不知道要做些什么。
[00:17.92]JANE:What shall we do today?The weather's not very good.
[00:20.90]JANE：我们今天要做什么？今天的天气不是很好。
[00:23.88]ZHOU LAN:I feel like going to a museum.
[00:28.42]It's too wet to go walking around London.
[00:30.90]ZHOU LAN：我想去博物馆。天气太湿不能逛伦敦。
[00:33.38]JANE:I agree.Which museum would you like to visit?
[00:36.21]JANE：我同意。你想去参观什么博物馆？
[00:39.03]What about the Natural History Museum?So far as I know,it's free.
[00:43.30]ZHOU LAN：自然历史博物馆。就我所知，自然历史博物馆是免费的。
[00:47.57]No,not any more.It used to be free but now you have to pay to get in.
[00:51.89]JANE:不再是，以前是免费的不过现在是要钱的。
[00:56.22]ZHOU LAN:What about you?What do you feel like doing?
[00:58.95]ZHOU LAN:你呢？你想做什么？
[01:01.68]JANE:Personally,I'd rather go to the Science Museum.
[01:04.39]JANE:按我的意思我更想去科学博物馆。
[01:07.11]They've got a special exhibition on this month.
[01:12.67]It's all about space and satellites.
[01:15.00]他们这个月有特别的展览,是关于太空和人造卫星.
[01:17.32]ZHOU LAN:I'd like to see that too.
[01:19.31]ZHOU LAN:我也想去看.
[01:21.29]I'm planning to do a special study of satellites next term.
[01:24.52]我计划下个学期做一个人造卫星的专门学习.
[01:27.75]Maybe I could find out some useful information.
[01:30.67]我也许能找到一些有用的资料.
[01:33.60]JANE:Fine!Why don't you get your things ready?
[01:36.18]JANE:太好了!你为什么不把你的事情都准备好呢?
[01:38.77]I'll tell my mother what we've decided to do.
[01:41.39]我要把这事告诉我的妈妈.
[01:44.02]Lesson 54 2 Reading comprehension
[01:50.11]第54课 2 阅读理解
[01:56.19]Read the passage to find the answers to these questions:
[01:58.92]阅读文章找出这些问题的答案
[02:01.65]1 Why are satellites so expensive?
[02:04.28]1 为什么人造卫星会这么贵?
[02:06.90]2 What can satellites send back to the earth?
[02:09.74]2有什么东西能使得人造卫星回到地球上.
[02:12.57]SATELLITES (1)
[02:14.45]人造卫星(1)
[02:16.33]The moon travels round the earth once every month.
[02:19.36]每个月都是月亮绕着地球跑.
[02:22.39]It is a natural satellite of the earth.
[02:24.82]它是地球自然卫星.
[02:27.25]A satellite is an object,either natural or man-made,
[02:31.08]人造卫星是一个物体,也是自然的,或者是人造的
[02:34.91]which travels in an orbit round another object in space.
[02:38.33]在太空中进入轨道卫绕着转动.
[02:41.75]Man-made satellites are carried up into space by rockets.
[02:45.33]人造卫星被火箭运送到太空去.
[02:48.91]To escape the pull of the earth,
[02:53.06]a rocket must reach a speed of 28,440 km/h.
[02:58.04]为了摆脱地球吸引力,火箭必须要达到每小时28440千里的速度.
[03:03.01]If the rocket does not reach this speed,
[03:07.87]it will fall back to the earth.
[03:09.86]如果火箭没有达到这个速度,它就会回到地球来
[03:11.84]A satellite is one of the most expensive pieces
[03:17.41]of scientific equipment in the world
[03:19.73]在世界上,人造卫星是最贵的一种装置
[03:22.06]First,it must be very light,the lighter the better,
[03:25.32]首先,它必须是非常轻的越轻越好.
[03:28.59]because it has to be sent up into space by a rocket
[03:31.62]因为用火箭发射到太空去的.
[03:34.65]Second,it usually contains very expensive cameras.
[03:38.38]第二,它通常包含有昂贵的照相机.
[03:42.12]It has equipment for making electricity from sunshine,
[03:48.96]using very broad sun panels.
[03:51.39]它的装置设备用的电流来源于阳光,利用宽大的太阳能电池帆板.
[03:53.82]These are folded up inside the satellite.
[03:56.80]这些被折抱起来放在人造卫星里面.
[03:59.78]Once the satellite goes into its orbit round the earth,
[04:03.11]卫星一进入它绕地球的轨道,
[04:06.44]the panels are unfolded in order to catch the sunshine.
[04:10.02]电池帆板就展开来吸收阳光.
[04:13.60]There is a rocket motor on the satellite
[04:16.12]这个是火箭发动机在人造卫星里面.
[04:18.64]by which the direction of the satellite can be changed if necessary
[04:22.22]如果有必要就改变人造卫星的方向.
[04:25.80]Satellites for broadcasting
[04:27.87]人造卫星为广播
[04:29.95]are used to send radio
[04:34.10]and TV programmes from one part of the world to another.
[04:37.22]通常把无线电通信和电视节目从世界的一边发送到另一边.
[04:40.35]Most of these satellites do not change their positions
[04:43.38]大部分的人造卫星都没有改变它们的安置.
[04:46.41]They remain above the same place on the earth
[04:52.05]and travel round it in a very high circle.
[04:54.87]它们在地球上保持同样的高度并绕着地球快速圈动。
[04:57.69]In this way,they are able to connect broadcasting stations
[05:01.11]就是这样，它们才能连接得到电台
[05:04.54]which are a long distance from each other.
[05:06.96]才能在远离内接收到彼此的信息。
[05:09.39]Signals travel at the speed of light.
[05:12.12]信号以光的速度传播。
[05:14.85]They reach the satellite and return to the earth in less than a second.
[05:18.79]它们抵达人造卫星再返回地球所用的时间不用一秒钟。
[05:22.72]Weather satellites send information and photos of weather conditions
[05:26.40]天气卫星发射有关气象的信息和图片
[05:30.08]to weather stations on the earth.
[05:32.26]给地球上的气象台。
[05:34.45]It is therefore possible to say not only what the weather is like at present,
[05:38.52]因此，卫星不仅有可能报告当前的天气情况，
[05:42.60]but also what is likely to happen in the next day or two.
[05:46.38]而且还能预报未来一两天内天气可能要发生的情况。
[05:50.17]This is very useful when there is a hurricane in an area,
[05:53.55]这是非常有用的，当某个地区发生飓风，
[05:56.94]as it is possible to see the path of the hurricane in the satellite pictures.
[06:00.96]人们就可以在卫星图片上看到飓风的一部分。
[06:04.98]Ships and planes can be warned
[06:10.16]so that they can keep out of the path of the hurricane.
[06:13.03]船和飞机就会被提醒，那么它们就会远离飓风来临的轨道。
[06:15.90]Lesson 55 1 Reading comprehension
[06:21.79]第55课 1 阅读理解
[06:27.68]SATELLITES (2)
[06:29.81]人造卫星（2）
[06:31.94]In 1964 a group of 17 countries
[06:34.97]在1964年，由17个国家组成的一个团体
[06:38.00]set up an organization for sending telephone signals by satellite.
[06:41.38]用卫星建立了一个发送电话信号的的组织。
[06:44.77]Their first satellite was called Early Bird.
[06:47.34]他们把第一个人造卫星叫做
[06:49.91]Today there are more than 100 nations in this group
[06:52.84]今天这个团体的成员已经超过100个国家
[06:55.76]and dozens of satellites have been put into space.
[06:58.35]并且也有很多人造卫星发射到太空中。
[07:00.94]You can telephone somebody on the other side of the world
[07:03.72]你可以打电话给地球的另一半的人
[07:06.50]with the help of a satellite.
[07:08.88]通过人造卫星。
[07:11.26]Satellites are used more and more
[07:15.62]to take photos of the earth and to produce maps.
[07:18.40]人造卫星越来越广泛的运用到地球照相和制作地图。
[07:21.18]Special cameras can produce pictures
[07:25.73]showing where different metals can be found.
[07:27.91]在特殊照相机照出来的图片上可以发现不同的金属.
[07:30.09]They can tell the difference between health plants
[07:35.05]and plants that are diseased.
[07:36.83]它们可以展示出健康的植物与有病害的植物的区别。
[07:38.61]This is useful for scientists who work in forests and in agriculture.
[07:41.83]这有利于科学家们在森林与农业方面的研究工作。
[07:45.06]There are many research stations on the earth
[07:47.33]在地球上他们有很多研究所
[07:49.60]in which outer space is studied.
[07:51.48]用来学习太空。
[07:53.36]The problem with looking into space from the earth
[07:55.70]问题是从地球上观察太空外层
[07:58.04]is that there is a lot of dust in the earth's air.
[08:00.47]有太多的灰尘在地球上的空气中。
[08:02.90]The dusty air makes it difficult to get a clear picture of space.
[08:05.98]这些灰尘给拍摄清析的图片曾加了难度。
[08:09.06]With space satellites there are no such problems.
[08:11.55]要是用太空中的卫星就没有这样的问题出现。
[08:14.03]They are being used more and more to collect information about space,
[08:17.21]太空卫星越来越被用来收集有关太空的信息，
[08:20.40]to carry out experiments and to send the information back
[08:23.22]来完成它的实验和把信息传回到
[08:26.04]to research centres on the earth.
[08:27.96]地球上的研究中心。 |