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SSS 2012-02-16

时间:2012-03-19 06:00来源:互联网 提供网友:gmeng   字体: [ ]
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    (单词翻译:双击或拖选)

 This is Scientific American 60 second Science, I'm Cynthia Graber, got a minute?

 
We’re not the only animals that like to knock back the hard stuff. Studies have shown that some mammals seek out food and drink that naturally contains alcohol. And according to new research, fruit flies will purposely hit the bottle: to self-medicate.
 
Fruit fly larvae1 eat rotting and fermenting2 fruit. The tiny insects have developed strong alcohol resistance. Which comes in handy when faced with parasitic3 wasps4.
 
Scientists studied two species of wasps that lay their eggs inside fruit fly larvae. When the wasps hatch, they eat the fruit flies from the inside out. But when the flies have consumed extra alcohol, the wasps have a tougher time depositing their young among the larvae. And even if they do manage to infect the fruit fly larvae, not as many wasps survive in the presence of alcohol.
 
In the new study, scientists found that the fruit flies seek out alcohol when they become infected—in effect, as anti-wasp medicine. The finding was published in the journal Current Biology. 
 
The researchers say there’s no evidence that humans use alcohol at times for parasite5 control. But it might be time to do that experiment. Under more controlled conditions than usual.
 
Thanks for the minute for Scientific America 60 second Science, I'm Cynthia Graber. 
 
knock back:drink, swallow; specifically : to toss down (an alcoholic beverage) 

点击收听单词发音收听单词发音  

1 larvae w2CxP     
n.幼虫
参考例句:
  • Larvae are parasitic on sheep.幼虫寄生在绵羊的身上。
  • The larvae prey upon small aphids.这种幼虫以小蚜虫为食。
2 fermenting fdd52e85d75b46898edb910a097ddbf6     
v.(使)发酵( ferment的现在分词 );(使)激动;骚动;骚扰
参考例句:
  • The fermenting wine has bubbled up and over the top. 发酵的葡萄酒已经冒泡,溢了出来。 来自辞典例句
  • It must be processed through methods like boiling, grinding or fermenting. 它必须通过煮沸、研磨、或者发酵等方法加工。 来自互联网
3 parasitic 7Lbxx     
adj.寄生的
参考例句:
  • Will global warming mean the spread of tropical parasitic diseases?全球变暖是否意味着热带寄生虫病会蔓延呢?
  • By definition,this way of life is parasitic.从其含义来说,这是种寄生虫的生活方式。
4 wasps fb5b4ba79c574cee74f48a72a48c03ef     
黄蜂( wasp的名词复数 ); 胡蜂; 易动怒的人; 刻毒的人
参考例句:
  • There's a wasps' nest in that old tree. 那棵老树上有一个黄蜂巢。
  • We live in dread not only of unpleasant insects like spiders or wasps, but of quite harmless ones like moths. 我们不仅生活在对象蜘蛛或黄蜂这样的小虫的惧怕中,而且生活在对诸如飞蛾这样无害昆虫的惧怕中
5 parasite U4lzN     
n.寄生虫;寄生菌;食客
参考例句:
  • The lazy man was a parasite on his family.那懒汉是家里的寄生虫。
  • I don't want to be a parasite.I must earn my own way in life.我不想做寄生虫,我要自己养活自己。
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