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 > 托福听力 > 正文
托福培训

扫码免费领资料

内含托福全科备考资料

更有免费水平测试及备考规划

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

托福听力练习-科学美国人60秒:喷嚏云

2017-02-08 16:51:55来源：科学美国人60秒

点击查看>>科学美国人60秒音频：喷嚏云

　　科学美国人60秒中英文翻译：喷嚏云

　　科学美国人60秒英文文本

　　When you have to sneeze or cough, do it into the bend of your arm.

　　Sneeze into your arm with Elmo. Ah-choo!

　　Gordon and Elmo from Sesame Street are right.

　　And MIT researchers recently found that viruses can travel much further than we thought.

　　Which shows how important it is to block coughs and sneezes.

　　The researchers used high-speed imaging of folks coughing and sneezing, along with simulations and mathematical models.

　　The new research shows that multiple drops travel in a cloud.

　　And the cloud’s turbulence pulls in surrounding air, which allows the goopy assemblage to maintain buoyancy and move farther.

　　Heavier particles drop out first, but about five times further out than had been previously predicted.

　　And the small ones swirl around and can be carried 200 times past previously predicted distances.

　　The research is in the Journal of Fluid Mechanics.

　　Longer flight distances means coughs and sneezes can often reach ventilation systems.

　　The researchers thus encourage hospital and airplane engineers to consider designs that block droplet flight and thus keep everyone else from catching your cold.

　　中文翻译请点击下一页

本文关键字: 科学美国人60秒 科学60秒下载 托福听力

上一页 1 2 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