课程咨询

托福考试网 托福资料下载 托福资讯 0元讲座 水平测试

托福考试练习
新东方在线 > TOEFL > 托福阅读 > 正文
托福培训

扫码免费领资料

托福全科备考资料

免费水平测试及规划

托福培训

扫码关注掌握一手留学资讯

回复XDF免费水平测试

录播精讲 直播课HOT

托福阅读素材：无动力行走装置(自然科学篇)

2015-04-29 11:01:36来源：网络

　　托福阅读素材自然科学篇：这一新发明通过带在普通鞋子上的装置减轻肌肉的活动，使行走变得轻松。新东方在线托福网为大家带来托福阅读素材：多无动力行走装置(自然科学篇)，希望对大家托福备考有所帮助，更多精彩尽请关注新东方在线托福网!

　　曾经人们认为想要造出帮助人行走的装置非常困难.现在美国科学家造出一种小的可带在普通鞋子上的装置。这个新发明减轻肌肉的活动，使行走变得轻松。在研究和设计过程中，他们主要参考了哪些研究结果，这种装置将会用在哪些方面呢?和托福小编一起浏览今天的托福阅读材料吧!

　　文章中的疑难词：

　　boost n. 推动vi. 宣扬vt. 促进

　　exoskeleton n.外骨骼

　　restorevt. 恢复;修复

　　spring n. 春天vt. 使跳起

　　clutch n. 离合器;控制vt. 抓住;紧握

　　stroke .中风;轻抚vt.轻抚;敲击

　　manufacturer n. 制造商

　　Motor-Free Device Reduces Stress from Walking

　　让行走更轻松的无动力装备

　　Devices that help people walk were once thought to be difficult, if not impossible, to design. Until recently, such a device required electricity from an external power supply. Now, American scientists have built a small, wearable addition to normal shoes. Their new invention eases the load on muscles in the leg and makes walking easier.

　　Steven Collins and Greg Sawicki are biomedical engineers. They both studied how human beings walk. They found that our ankles and calves perform motions similar to a spring joined to a clutch. In an automobile, a clutch is used to connect and disconnect a driving or driven part of an engine or other piece of equipment. The researchers found that the human body parts are able to both store and release energy, just like a spring.

　　Steven Collins works with Carnegie Mellon University in Pennsylvania. Greg Sawicki is with North Carolina State University.

　　"We found in basic science experiments that that system, your calf and Achilles tendon, works a lot like a catapult. So, the muscle holds on to the tendon and your body actually stretches your Achilles tendon quite a bit and then stores the energy in the tissue and then it's given back to propel you forward in the world."

　　Mr. Sawicki says he and Mr. Collins designed a mechanical device that performs the same kind of energy ‘give-and-take' outside the body. Their new ankle exoskeleton is made of carbon fiber and metal. It connects to ordinary shoes and takes over part of the work of walking. Mr. Sawicki says the device reduces the amount of energy required for walking by as much as seven percent.

　　The unpowered ankle exoskeleton can help people walk farther with the same amount of energy. It also can restore normal movement for individuals who have trouble walking.

　　Mr. Sawicki says it takes only a few minutes for someone to get used to the ankle exoskeleton. He says the wearer quickly learns to use less muscle energy, letting the device do much of the work.

　　"You really don't notice it until when you take it off. And when you take it off you realize that it was there and giving you the boost."

　　Mr. Sawicki says the device is mainly meant for people recovering from a surgery operation or a stroke. He adds that anyone who spends a lot of time walking, like hospital workers and policemen, could use the device.

　　There are no plans to make the ankle exoskeleton available to the general public. But the inventors say some manufacturers have expressed interest in the device.

本文关键字: 托福阅读 托福阅读素材 自然科学

上一页 1 2 3 下一页

托福辅导

关注新东方在线托福

托福机经·Official题目练习

考前重点突破·听说读写海量资料

更多资料

关注新东方在线托福，
回复【XDF】获取大礼包

托福辅导
  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加】，回复对应关键字领取学习资料。
更多>>
更多内容

免费获取托福备考大礼包

微信扫描下方二维码 立即领取

托福辅导
更多>>
更多公益讲座>>
更多>>
更多资料
托福TPO 托福听力练习 托福口语练习 托福阅读练习 托福写作练习
我要
反馈 返回
首页
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10