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托福听力短文 I-01-3

时间:2009-01-10 00:25来源:互联网 提供网友:Zoe-w   字体: [ ]
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    (单词翻译:双击或拖选)

(man) Located at the NASA Research Center in Iowa is a 5,000-gallon vat1 of water, and inside the tank is an underwater treadmill2 designed by Dava Newman, an aerospace3 engineer. For four years Newman observed scuba4 divers5 as they simulated walking on the Moon and on Mars on her underwater moving belt. She wanted to discover how the gravity of the Moon and of Mars would affect human movement.

To do this, Newman attached weights to the divers and then lowered them into the tank and onto the treadmill. These weights were carefully adjusted so that the divers could experience underwater the gravity of the Moon and of Mars as they walked on the treadmill. Newman concluded that walking on Mars will probably be easier than walking on the Moon. The Moon has less gravity than Mars does, so at lunar gravity, the divers struggled to keep their balance and walked awkwardly. But at Martian gravity, the divers had greater traction6 and stability and could easily adjust to a pace of 1.5 miles per hour. As Newman gradually increased the speed of the treadmill, the divers took longer, graceful7 strides until they comfortably settled into an even quicker pace. Newman also noted8 that at Martian gravity, the divers needed less oxygen.

The data Newman collected will help in the future design of Martian space suits. Compared to lunar space suits, Martian space suits will require smaller air tanks; and, to allow for freer movement, the elbow and knee areas of the space suits will also be altered.

Good evening. My name is Pam Jones, and on behalf of the Modern Dance club


点击收听单词发音收听单词发音  

1 vat sKszW     
n.(=value added tax)增值税,大桶
参考例句:
  • The office is asking for the vat papers.办事处要有关增值税的文件。
  • His father emptied sacks of stale rye bread into the vat.他父亲把一袋袋发霉的黑面包倒进大桶里。
2 treadmill 1pOyz     
n.踏车;单调的工作
参考例句:
  • The treadmill has a heart rate monitor.跑步机上有个脉搏监视器。
  • Drugs remove man from the treadmill of routine.药物可以使人摆脱日常单调的工作带来的疲劳。
3 aerospace CK2yf     
adj.航空的,宇宙航行的
参考例句:
  • The world's entire aerospace industry is feeling the chill winds of recession.全世界的航空航天工业都感受到了经济衰退的寒意。
  • Edward Murphy was an aerospace engineer for the US Army.爱德华·墨菲是一名美军的航宇工程师。
4 scuba YjDzRf     
n.水中呼吸器
参考例句:
  • I first got hooked on scuba diving when I was twelve.12岁时我开始迷上了带水中呼吸器潜水。
  • While on honeymoon in Bali,she learned to scuba dive.她在巴厘岛度蜜月时学会了带水肺潜水。
5 divers hu9z23     
adj.不同的;种种的
参考例句:
  • He chose divers of them,who were asked to accompany him.他选择他们当中的几个人,要他们和他作伴。
  • Two divers work together while a standby diver remains on the surface.两名潜水员协同工作,同时有一名候补潜水员留在水面上。
6 traction kJXz3     
n.牵引;附着摩擦力
参考例句:
  • I'll show you how the traction is applied.我会让你看如何做这种牵引。
  • She's injured her back and is in traction for a month.她背部受伤,正在作一个月的牵引治疗。
7 graceful deHza     
adj.优美的,优雅的;得体的
参考例句:
  • His movements on the parallel bars were very graceful.他的双杠动作可帅了!
  • The ballet dancer is so graceful.芭蕾舞演员的姿态是如此的优美。
8 noted 5n4zXc     
adj.著名的,知名的
参考例句:
  • The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
  • Jim is noted for arriving late for work.吉姆上班迟到出了名。
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