在线英语听力室

SSS 2010-07-15

时间：2010-08-05 06:53:09

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（单词翻译）

Clothing is so yesterday. I mean, really, what can it do? It can’t pick up sound, or beep at us if something’s wrong. Or can it? M.I.T. researchers say they’ve developed a fiber1 that would allow clothing to eventually do those things. Their study is in the journal Nature Materials.

A big key to the fiber is a plastic commonly used in microphones. Its particular molecular2 structure involves a lopsided arrangement of fluorine atoms on one side and hydrogen atoms on the other. That asymmetry3 makes the plastic piezoelectric: it changes shape when it encounters an electric field.

So any electric current will then cause the fibers4 to vibrate. The fibers could act as a microphone or a speaker, depending on whether the vibrations5 were being recorded or amplified6.

The clothing mic could capture speech, sure. But it could also monitor health by detecting almost imperceptible sounds from the body. Sounds like blood flow, which could make a shirt a 24-hour blood-pressure monitor. So maybe someday, your clothes will say: “I detect a rise in blood pressure. Please sit down. Machine wash me…”

Thanks for the minute for Scientific American’s 60-Second Science. I’m Cynthia Graber.

"Only non-chlorine bleach7 should be used when needed. Tumble me dry ... "
 


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1 fiber NzAye     
n.纤维，纤维质
参考例句：
  • The basic structural unit of yarn is the fiber.纤维是纱的基本结构单元。
  • The material must be free of fiber clumps.这种材料必须无纤维块。
2 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。
3 asymmetry zyIzlK     
n.不对称；adj.不对称的，不对等的
参考例句：
  • These bands must introduce longitudinal asymmetry in the planetary albedo.这些云带必定引起行星反照率的经向不对称性。
  • In any event the asymmetry is clear enough.总之，不对称是非常明显的。
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 vibrations d94a4ca3e6fa6302ae79121ffdf03b40     
n.摆动( vibration的名词复数 )；震动；感受；（偏离平衡位置的）一次性往复振动
参考例句：
  • We could feel the vibrations from the trucks passing outside. 我们可以感到外面卡车经过时的颤动。
  • I am drawn to that girl; I get good vibrations from her. 我被那女孩吸引住了，她使我产生良好的感觉。 来自《简明英汉词典》
6 amplified d305c65f3ed83c07379c830f9ade119d     
放大，扩大( amplify的过去式和过去分词 )； 增强； 详述
参考例句：
  • He amplified on his remarks with drawings and figures. 他用图表详细地解释了他的话。
  • He amplified the whole course of the incident. 他详述了事件的全过程。
7 bleach Rtpz6     
vt.使漂白；vi.变白；n.漂白剂
参考例句：
  • These products don't bleach the hair.这些产品不会使头发变白。
  • Did you bleach this tablecloth?你把这块桌布漂白了吗？

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