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SSS 2008-07-31

时间:2010-05-14 05:55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 Christopher Intagliata. Got a minute?

Tricky1 cyclists in the Tour de France sometimes cheat by upping their red blood cell count for those tough stretches through the Alps. But researchers at California’s Salk Institute just discovered a new sort of endurance training in a pill—pop it and go farther, for longer. For mice, at least. But there’s evidence it works for us, too. The research appears in the journal Cell. First, the team gave mice a drug that targets a sort of endurance gene2. It didn’t work by itself. But with exercise training, the doping mice ran twice as far as their equally trained, drug-free buddies3. And they had more of the muscle fibers4 that boost endurance. The researchers realized exercise was the key to activating5 this endurance circuit. So they gave the mice a different drug that mimics6 a natural chemical produced during exercise, called AMP. When AMP levels rise, the endurance circuit kicks in. So with the second drug, even lazy, untrained mice ran as far as trained, drug-free mice. But athletes beware—the researchers are already working with the World Anti-Doping Agency to bust7 would-be Olympic cheats. 

Thanks for the minute. For Scientific American's 60-Second Science, I'm Christopher Intagliata
 


点击收听单词发音收听单词发音  

1 tricky 9fCzyd     
adj.狡猾的,奸诈的;(工作等)棘手的,微妙的
参考例句:
  • I'm in a rather tricky position.Can you help me out?我的处境很棘手,你能帮我吗?
  • He avoided this tricky question and talked in generalities.他回避了这个非常微妙的问题,只做了个笼统的表述。
2 gene WgKxx     
n.遗传因子,基因
参考例句:
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
3 buddies ea4cd9ed8ce2973de7d893f64efe0596     
n.密友( buddy的名词复数 );同伴;弟兄;(用于称呼男子,常带怒气)家伙v.(如密友、战友、伙伴、弟兄般)交往( buddy的第三人称单数 );做朋友;亲近(…);伴护艾滋病人
参考例句:
  • We became great buddies. 我们成了非常好的朋友。 来自辞典例句
  • The two of them have become great buddies. 他们俩成了要好的朋友。 来自辞典例句
4 fibers 421d63991f1d1fc8826d6e71d5e15f53     
光纤( fiber的名词复数 ); (织物的)质地; 纤维,纤维物质
参考例句:
  • Thesolution of collagen-PVA was wet spined with the sodium sulfate as coagulant and collagen-PVA composite fibers were prepared. 在此基础上,以硫酸钠为凝固剂,对胶原-PVA共混溶液进行湿法纺丝,制备了胶原-PVA复合纤维。
  • Sympathetic fibers are distributed to all regions of the heart. 交感神经纤维分布于心脏的所有部分。
5 activating 948eea612456562bf255d3a9c59c40a3     
活动的,活性的
参考例句:
  • "I didn't say we'd got to stop activating the masses! “我并没说就此不发动! 来自子夜部分
  • Presumably both the very small size and activating influence of fluorine atoms contribute to this exception. 这大概是由于氟原子半径小和活性高这两个原因的影响,氟原子对这种例外做出了贡献。
6 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
7 bust WszzB     
vt.打破;vi.爆裂;n.半身像;胸部
参考例句:
  • I dropped my camera on the pavement and bust it. 我把照相机掉在人行道上摔坏了。
  • She has worked up a lump of clay into a bust.她把一块黏土精心制作成一个半身像。
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