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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  And there are unshared pairs, as Lewis predicted.
  路易斯也预测到了未共用电子对
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  And again they're less -- but in this case they're even less
  但实际的数量 在这个例子里
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  than 5% of what Lewis would've predicted.
  只占他所预测的5%还不到
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  But you can see them.
  他没有预测到的 我们能从实验里看到
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  Now this raises the question,
  这就带来了一个问题
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  is there a better bond theory than Lewis theory,
  有没有一个比路易斯的更好的理论
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  maybe even one that's quantitative,
  甚至是一个定量的理论
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  that would give you numbers for these things,
  能对这些东西定量
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  rather than just say there are pairs here and there.
  而不是简单说哪里哪里会有一对电子
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  And the answer, thank goodness,is yes,
  而谢天谢地 答案是有
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  there is a great theory for this, and what it is,
  有这样一个伟大的理论 那是什么呢
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  is chemical quantum mechanics.
  那就是化学量子力学