英语 英语 日语 日语 韩语 韩语 法语 法语 德语 德语 西班牙语 西班牙语 意大利语 意大利语 阿拉伯语 阿拉伯语 葡萄牙语 葡萄牙语 越南语 越南语 俄语 俄语 芬兰语 芬兰语 泰语 泰语 泰语 丹麦语 泰语 对外汉语

英语听力文摘 English Digest 396、长寿的奥秘!

时间:2012-01-06 08:05来源:互联网 提供网友:fei   字体: [ ]
特别声明:本栏目内容均从网络收集或者网友提供,供仅参考试用,我们无法保证内容完整和正确。如果资料损害了您的权益,请与站长联系,我们将及时删除并致以歉意。
    (单词翻译:双击或拖选)
One Step Closer to Living Longer
 
D: You know, when I watch futuristic sci-fi movies, I notice everyone has  a normal aging pattern. You don't encounter1 people who just having been107 years old. That's probably a mistake.
 
Y: A mistake? Why?
 
D: Because science is giving us longer lifespans all the time. Researchers these days are even starting to understand how the body sends signals2 to itself, determining how it ages.
 
Y: Now, that sounds like science fiction!
 
D: It's true. A study conducted by James Carey and his colleagues3 at the University of California4, for example, found a link between how long a mouse lives and its ovaries.
 
Y: Its ovaries? What do they have to do with the aging?
 
D: The researchers removed the ovaries of one set of mice when they were a few weeks old. Those mice didn’t live as long as mice who still had their ovaries. Another group of mice had their ovaries removed but got young ones later.
The mice with the young ovaries implanted into them lived forty percent longer than the ones who kept their original ovaries, and sixty percent longer than the ones with no ovaries at all!
 
Y: Yalza! Sixty percent longer!?
 
D: Some chemical message is being sent from the ovaries to the rest of the body, telling it what stage of life it is in. By renewing5 their ovaries, the scientists were essentially6 able to set the clock back.
 
Y: So who wants mice to live longer?
 
D: Mice are just test. If we could understand how the body tells itself to age, maybe we could make other species7 live longer…like people.
 
 

 
人类接近长寿的又一步
 
D: 我看未来派科幻电影的时候,发觉里面的人物年龄都是很正常的,就像我们普通人一样,活不了特别长。在这种电影里,你根本就不可能会看到一个活到一百多岁的人。我个人觉得这有问题。
 
Y: 有问题?你又有何凭证?
 
D: 因为科学一直以来都致力于延长人们寿命的研究。近日,又有了突破性的进展。
 
Y: 这样听来倒真的像是科幻小说了!
 
D: 这可是真的。比如说吧,加利佛利亚大学的James Carey和他的同事们进行了一项研究,他们发现老鼠的寿命和它的卵巢有很大关联。
 
Y: 卵巢?卵巢和寿命会有什么关系啊?
 
D: 研究人员准备了三组老鼠。在老鼠几星期大的时候,他们将一组老鼠的卵巢切除。结果表明,被切除卵巢的一组老鼠没有未被切除卵巢的一组老鼠长寿。另外还有一组老鼠被切除了卵巢,但后来又被植入了年轻的卵巢。被植入年轻卵巢的一组老鼠比未被切除卵巢的一组老鼠寿命长40%,比被切除卵巢的一组老鼠寿命整整长了60%!
 
Y: 啊!60%!?
 
D: 卵巢可以将某些化学信息传送至身体的其他部分,生命究竟处于哪个阶段。科学家们再将卵巢植入老鼠体内,可以说是让时光倒流了。
 
Y: 谁那么无聊,想要让老鼠长寿啊?
 
D: 老鼠只是试验品。如果说我们能搞清楚老鼠的身体是怎样来发送有关年龄的信息的,有可能,我们就能使其他物种长寿些……比如,人类!
 

点击收听单词发音收听单词发音  

1 encounter Mj8zB     
v.遇到,偶然碰到;遭遇;n.遭遇;意外的相见
参考例句:
  • It was a bloody encounter between the two armies. 这是那两军之间的一次激烈的遭遇战。
  • A fortunate encounter brought the two friends together after a long separation.两位老朋友长期分离这次才有幸相遇。
2 signals a8420f8bebd6d9578b405b6bbaa813d9     
n.信号( signal的名词复数 );(无线电或电视所传送的)讯号;标志;(尤指铁路和公路上的)指示灯v.发信号,用信号传达,用信号通讯( signal的第三人称单数 );发暗号;示意
参考例句:
  • signals transmitted from a satellite 从卫星传送来的信号
  • This metal tower is used to relay television signals to distant villages. 这个金属塔是用于向遥远的村子转播电视讯号的。 来自《简明英汉词典》
3 colleagues 7801ef7e930d2e49cf6e071f5fc43c63     
n.同事,同僚( colleague的名词复数 );同人
参考例句:
  • He wanted to confer with his colleagues before reaching a decision. 他想与他的同事先商议一下再作出决定。
  • She is held in high esteem by her colleagues. 她深受同事的敬重。
4 California FxizMX     
n.加利福尼亚(美国)
参考例句:
  • He was elected governor of the state of California.他当选为加州州长。
  • We were driving on a California freeway.我们正沿着加利福尼亚的一条快车道驾车行驶。
5 renewing fbf5b451f590a940e1a18477b062f8e0     
(使)复原, (使)更新,赋予新的生命和活力( renew的现在分词 ); 重新开始; 继续; 补充
参考例句:
  • He feels his youth renewing. 他觉得越活越年轻了。
  • A lot of the cost of maintenance went into renewing brakes. 很多的维修费用都花在了更换刹车方面。
6 essentially nntxw     
adv.本质上,实质上,基本上
参考例句:
  • Really great men are essentially modest.真正的伟人大都很谦虚。
  • She is an essentially selfish person.她本质上是个自私自利的人。
7 species FTizN     
n.物种,种群
参考例句:
  • Are we the only thinking species in the whole of creation?我们是万物中惟一有思想的物种吗?
  • This species of bird now exists only in Africa.这种鸟现在只存在于非洲。
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎点击提交分享给大家。
------分隔线----------------------------
顶一下
(1)
100%
踩一下
(0)
0%
最新评论 查看所有评论
发表评论 查看所有评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:
听力搜索
推荐频道
论坛新贴