来自《耶鲁大学开放课程：新生有机化学 第7集 第7集》

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  through those three-membered rings, right?
  处在这些三角环上的键
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  And what do you notice about that bond?
  你们发现了什么
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  It isn't there.
  那里没有键
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  There isn't any electron density for that bond.
  这个键的位置没有任何电子密度
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  So it's a missing bond.
  这个键消失了
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  This is what we'll refer to as pathological bonding,
  这就是我所说的病态的键
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  It's not what Lewis would have expected, maybe;
  这也许并不如路易斯所预期的
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  we don't have Lewis to talk to,
  我们没法找路易斯来聊聊
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  so we don't know
  我们没办法知道
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  what he would've thought about this particular molecule.
  他怎么看到这种特殊的分子
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  So here's a third plane to slice, which goes through those three atoms,
  接下来要截第三个面了
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  and here's the picture of it.
  上面有三个原子 然后是图