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SSS 2009-03-24

时间:2010-05-17 06:51来源:互联网 提供网友:木渐浅。   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute.

 

Understanding all the genes1 and molecules3 involved in human disease is quite a challenge. That’s why scientists study model organisms, like flies and worms and mice, that are made of the same stuff we are. Now scientists in Illinois and Israel have found a strange new model that they say mimics4 the molecular5 behavior of human cancers: the naked mole2 rat.

These odd little creatures live in subterranean6 tunnels where air is at a premium7. So the animals have evolved a strategy for surviving when oxygen is scarce. Well, the same is true of cancers. In a rapidly growing tumor8, the cells in the center are often oxygen-deprived, because blood vessels9 don’t reach all the way inside.

And the scientists are finding that mole rats and tumor cells use similar mechanisms10 to make the most of the little oxygen they have. In particular, the researchers have so far identified three genes that respond to plummeting11 oxygen levels. The genes’ activity patterns are the same in mole rats and in cancer cells. Understanding how these genes work could suggest new ways of choking the life out of tumors, by turning off their ability to live like mole rats. Well, malignant12 mole rats.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Karen Hopkin.
 


点击收听单词发音收听单词发音  

1 genes 01914f8eac35d7e14afa065217edd8c0     
n.基因( gene的名词复数 )
参考例句:
  • You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
2 mole 26Nzn     
n.胎块;痣;克分子
参考例句:
  • She had a tiny mole on her cheek.她的面颊上有一颗小黑痣。
  • The young girl felt very self- conscious about the large mole on her chin.那位年轻姑娘对自己下巴上的一颗大痣感到很不自在。
3 molecules 187c25e49d45ad10b2f266c1fa7a8d49     
分子( molecule的名词复数 )
参考例句:
  • The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
  • Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里,大分子裂变为小分子。
4 mimics f8207fb5fa948f536c5186311e3e641d     
n.模仿名人言行的娱乐演员,滑稽剧演员( mimic的名词复数 );善于模仿的人或物v.(尤指为了逗乐而)模仿( mimic的第三人称单数 );酷似
参考例句:
  • Methods:Models were generate by CT scan,Mimics software and Abaqus software. 方法:采用CT扫描,Mimics软件和Abaqus软件的CAD进行三维有限元模型的创建。 来自互联网
  • Relaxing the mind and body mimics the effect that some blood-pressure pills would have. 放松身心会产生某些降压药才能产生的效果。 来自辞典例句
5 molecular mE9xh     
adj.分子的;克分子的
参考例句:
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时,分子的碰撞就停止了。
6 subterranean ssWwo     
adj.地下的,地表下的
参考例句:
  • London has 9 miles of such subterranean passages.伦敦像这样的地下通道有9英里长。
  • We wandered through subterranean passages.我们漫游地下通道。
7 premium EPSxX     
n.加付款;赠品;adj.高级的;售价高的
参考例句:
  • You have to pay a premium for express delivery.寄快递你得付额外费用。
  • Fresh water was at a premium after the reservoir was contaminated.在水库被污染之后,清水便因稀而贵了。
8 tumor fKxzm     
n.(肿)瘤,肿块(英)tumour
参考例句:
  • He was died of a malignant tumor.他死于恶性肿瘤。
  • The surgeons irradiated the tumor.外科医生用X射线照射那个肿瘤。
9 vessels fc9307c2593b522954eadb3ee6c57480     
n.血管( vessel的名词复数 );船;容器;(具有特殊品质或接受特殊品质的)人
参考例句:
  • The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。 来自《简明英汉词典》
  • All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。 来自《现代汉英综合大词典》
10 mechanisms d0db71d70348ef1c49f05f59097917b8     
n.机械( mechanism的名词复数 );机械装置;[生物学] 机制;机械作用
参考例句:
  • The research will provide direct insight into molecular mechanisms. 这项研究将使人能够直接地了解分子的机理。 来自《简明英汉词典》
  • He explained how the two mechanisms worked. 他解释这两台机械装置是如何工作的。 来自《简明英汉词典》
11 plummeting a560b06f9b99975167411b72966f5588     
v.垂直落下,骤然跌落( plummet的现在分词 )
参考例句:
  • Prices are rising, falling, going up, going down, shooting up, plummeting, etc. 物价在上涨、下跌、上升、下落、猛然上涨、骤然下跌等。 来自辞典例句
  • The enemy plane went plummeting into the sea. 敌机直直掉进海里。 来自辞典例句
12 malignant Z89zY     
adj.恶性的,致命的;恶意的,恶毒的
参考例句:
  • Alexander got a malignant slander.亚历山大受到恶意的诽谤。
  • He started to his feet with a malignant glance at Winston.他爬了起来,不高兴地看了温斯顿一眼。
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