来自《耶鲁大学开放课程：新生有机化学 第4集 第4集》

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  Okay, now it would be possible to shift electrons here
  好 我们可以把电子移到这里
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  and draw a different Lewis structure.
  然后画一个不同的路易斯结构
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  Which of those two do you think is better?
  它们两个你们觉得哪个好
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  Probably the top one.
  可能顶上的那个吧
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  Why?
  为什么
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  Okay, there's separation of charge on the bottom. Okay?
  好 底下的有电荷分离 好吧
• 
  
  So there's bad charge separation.
  所以这是坏的电荷分离
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  The most electronegative atom, oxygen,
  大部分的电负性原子 比如氧啊
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  in fact has a positive charge not a negative charge. Right?
  实际上是带了正电而不是负电的 对吧
• 
  
  So that's -- not only is there a charge separation,
  所以 这不仅仅是有电荷分离
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  it's in the wrong direction.
  而且方向也倒了
• 
  
  But they're all octets that we've drawn in both structures.
  不过它们都是八电子稳定结构