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SSS 2008-08-29

时间:2010-05-14 06:58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 Adam Hinterthuer. This will just take a minute.

You’ve probably chased a fly or two around the house this summer. And, chances are, it took a few swings before you brought down the buzzing nuisance. Now a study in the August 28th issue of the journal Current Biology has uncovered just what makes a fly so hard to swat.

Michael Dickinson from the California Institute of Technology used high-speed digital video to record the evasive maneuvers1 of fruit flies. In the slow-mo instant replay, the flies’ bodies react to a swatter well before their wings carry them to safety. Blessed with nearly 360 degree vision, the fly first gauges2 the position of the swatter, then prepares an escape within 200 milliseconds. When approached from the front, for example, a fly shifts its middle legs forward and leans back. If you sneak3 in from the side, the fly leans in the opposite direction.  This positioning then lets the fly spring into a flight pattern that takes it out of the danger zone. So, if you want to get a fly on the first try, Dickinson says to aim at where you think it’s going, not where it is. Or you could always call in a SWAT team.

Thanks for the minute for Scientific American's 60-Second Science. I'm Adam Hinterthuer .


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1 maneuvers 4f463314799d35346cd7e8662b520abf     
n.策略,谋略,花招( maneuver的名词复数 )
参考例句:
  • He suspected at once that she had been spying upon his maneuvers. 他立刻猜想到,她已经侦察到他的行动。 来自辞典例句
  • Maneuvers in Guizhou occupied the Reds for four months. 贵州境内的作战占了红军四个月的时间。 来自辞典例句
2 gauges 29872e70c0d2a7366fc47f04800f1362     
n.规格( gauge的名词复数 );厚度;宽度;标准尺寸v.(用仪器)测量( gauge的第三人称单数 );估计;计量;划分
参考例句:
  • A thermometer gauges the temperature. 温度计可测量温度。 来自《简明英汉词典》
  • The fuel gauges dropped swiftly. 燃料表指针迅速下降。 来自《简明英汉词典》
3 sneak vr2yk     
vt.潜行(隐藏,填石缝);偷偷摸摸做;n.潜行;adj.暗中进行
参考例句:
  • He raised his spear and sneak forward.他提起长矛悄悄地前进。
  • I saw him sneak away from us.我看见他悄悄地从我们身边走开。
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