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SSS 2009-02-27

时间:2010-05-17 06:01来源:互联网 提供网友:木渐浅。   字体: [ ]
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This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ?

February 28th is International Sword Swallowers Awareness1 Day, according to practitioner2 Dan Meyer, who recently demonstrated the technique at the AAAS meeting in Chicago.

“When I put the sword in my mouth, I will repress the gag reflex in the back of the throat. Then I have to go behind my Adam’s apple, my prominentia laryngea, behind the voice box, the larynx, down about through the crichopharyngeal sphincter, up in the upper part of the mouth here. Then down into the esophagus, repress the peristalysis reflex, which is 22 pairs of muscles that swallows your food. From there relax the esophageal muscles, relax the lower esophageal sphincter, and slip the blade down into my stomach, repress the wretch3 reflex in my stomach.”

Sword swallowers have made important contributions to medicine—besides giving doctors work. “In 1868 Dr. Adolph Kussmaul at the University of Freiberg, Germany, developed the rigid4 endoscope, by using a sword swallower as his guinea pig. And he took him around on demonstrations5. And sword swallowers have been used throughout the years as guinea pigs for the medical and science communities. That’s what we’re celebrating on February 28th, on Sword Swallowers Day.”

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Steve Mirsky .

 


点击收听单词发音收听单词发音  

1 awareness 4yWzdW     
n.意识,觉悟,懂事,明智
参考例句:
  • There is a general awareness that smoking is harmful.人们普遍认识到吸烟有害健康。
  • Environmental awareness has increased over the years.这些年来人们的环境意识增强了。
2 practitioner 11Rzh     
n.实践者,从事者;(医生或律师等)开业者
参考例句:
  • He is an unqualified practitioner of law.他是个无资格的律师。
  • She was a medical practitioner before she entered politics.从政前她是个开业医生。
3 wretch EIPyl     
n.可怜的人,不幸的人;卑鄙的人
参考例句:
  • You are really an ungrateful wretch to complain instead of thanking him.你不但不谢他,还埋怨他,真不知好歹。
  • The dead husband is not the dishonoured wretch they fancied him.死去的丈夫不是他们所想象的不光彩的坏蛋。
4 rigid jDPyf     
adj.严格的,死板的;刚硬的,僵硬的
参考例句:
  • She became as rigid as adamant.她变得如顽石般的固执。
  • The examination was so rigid that nearly all aspirants were ruled out.考试很严,几乎所有的考生都被淘汰了。
5 demonstrations 0922be6a2a3be4bdbebd28c620ab8f2d     
证明( demonstration的名词复数 ); 表明; 表达; 游行示威
参考例句:
  • Lectures will be interspersed with practical demonstrations. 讲课中将不时插入实际示范。
  • The new military government has banned strikes and demonstrations. 新的军人政府禁止罢工和示威活动。
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