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【英语时差8,16】糖为什么会溶解？

时间：2015-11-06 06:32:54

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（单词翻译）

 Did you ever wonder why sugar dissolves in a cup of coffee? Why not have the sugar just float in the middle of the cup, without dissipating into the coffee? It’s because of the way water molecules2 interact with molecules in other substances. A water molecule1 has powerful magnetic properties, because of the two positively3 charged hydrogen atoms stuck to a negatively charged oxygen atom. A water molecule can actually break apart the bonds that hold together sugar molecules and insert itself in between them. This is what’s happening on a molecular4 level when you see the sugar cube getting wet and crumbling5 apart. Water molecules are busily inserting themselves between sugar molecules. Eventually they come between all the sugar molecules, dissolving the sugar cube.


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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 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。
3 positively vPTxw     
adv.明确地，断然，坚决地；实在，确实
参考例句：
  • She was positively glowing with happiness.她满脸幸福。
  • The weather was positively poisonous.这天气着实讨厌。
4 molecular mE9xh     
adj.分子的；克分子的
参考例句：
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时，分子的碰撞就停止了。
5 crumbling Pyaxy     
adj.摇摇欲坠的
参考例句：
  • an old house with crumbling plaster and a leaking roof 一所灰泥剥落、屋顶漏水的老房子
  • The boat was tied up alongside a crumbling limestone jetty. 这条船停泊在一个摇摇欲坠的石灰岩码头边。

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