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:囚禁水分子

2017-04-22 09:17:00来源：科学美国人60秒

点击查看>>科学美国人60秒音频：囚禁水分子

　　科学美国人60秒听力练习：囚禁水分子

　　科学美国人60秒英文文本

　　The carbon molecule known as a buckyball, a member of the fullerene family, can act as a cage for a variety of other chemicals. And now researchers have used one to trap a single molecule of water. The work appears in the journal Science. [Kei Kurotobi and Yasujiro Murata, A Single Molecule of Water Encapsulated in Fullerene C60]

　　Placing a molecule that's essential to life within a spherically symmetrical one could let researchers learn more about each.

　　Water molecules stick together, because they carry a slight charge on each end. As the positive pole of one H2O attracts the negative pole of another, the molecules cling tightly together. You can't separate a single water molecule from its fellows with a tiny pair of tweezers, so isolating it in a carbon cage may reveal new secrets about the intrinsic nature of a lone H2O.

　　What about the cage itself? Researchers already know that buckyballs refuse to dissolve in water, sometimes even floating like miniature beach balls. But what happens when the water is within? Putting polar molecules inside buckyballs may influence the chemical behavior of their outsides, and create new molecules with unique properties. Not to mention making our understanding even…fuller.

　　—Sophie Bushwick

　　中文翻译请点击下一页

本文关键字: 托福听力 科学美国人60秒

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