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SSS 2011-08-04

时间:2011-09-05 03:49来源:互联网 提供网友:gmeng   字体: [ ]
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    (单词翻译:双击或拖选)

 This is Scientific American’s 60-Second Science. I’m Sophie Bushwick. Got a minute? 

 
The carbon molecule1 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. Placing a molecule that's essential to life within a spherically2 symmetrical one could let researchers learn more about each.
 
Water molecules3 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 tweezers4, so isolating5 it in a carbon cage may reveal new secrets about the intrinsic nature of a lone6 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.
 
Thanks for the minute. For Scientific American’s 60-Second Science, I’m Sophie Bushwick.

点击收听单词发音收听单词发音  

1 molecule Y6Tzn     
n.分子,克分子
参考例句:
  • A molecule of water is made up of two atoms of hygrogen and one atom of oxygen.一个水分子是由P妈̬f婘̬ 妈̬成的。
  • This gives us the structural formula of the molecule.这种方式给出了分子的结构式。
2 spherically eaf44ba7ae09ae6f24f785f8e7d682e3     
球状地,球地
参考例句:
  • He also obtained similarity solutions for longitudinal and spherically symmetric motions. 他也得出了关于纵向对称运动和球面对称运动的类似解。
  • A spherically symmetric structure of the earth has been assumed. 人们把地球的构造假设为球状对称。
3 molecules 187c25e49d45ad10b2f266c1fa7a8d49     
分子( molecule的名词复数 )
参考例句:
  • The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
  • Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里,大分子裂变为小分子。
4 tweezers ffxzlw     
n.镊子
参考例句:
  • We simply removed from the cracked endocarp with sterile tweezers.我们简单地用消过毒的镊子从裂开的内果皮中取出种子。
  • Bee stings should be removed with tweezers.蜜蜂的螫刺应该用小镊子拔出来。
5 isolating 44778bf8913bd1ed228a8571456b945b     
adj.孤立的,绝缘的v.使隔离( isolate的现在分词 );将…剔出(以便看清和单独处理);使(某物质、细胞等)分离;使离析
参考例句:
  • Colour filters are not very effective in isolating narrow spectral bands. 一些滤色片不能很有效地分离狭窄的光谱带。 来自辞典例句
  • This became known as the streak method for isolating bacteria. 这个方法以后就称为分离细菌的划线法。 来自辞典例句
6 lone Q0cxL     
adj.孤寂的,单独的;唯一的
参考例句:
  • A lone sea gull flew across the sky.一只孤独的海鸥在空中飞过。
  • She could see a lone figure on the deserted beach.她在空旷的海滩上能看到一个孤独的身影。
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