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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  Negative kinetic energy.
  动能变为负值
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  Your great-grandparents didn't get that.
  很多人不理解这个
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  You can have kinetic energy that's less than zero.
  不理解动能还可以是负值
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  What does that mean? It means the total energy is
  那究竟意味着什么 意味着总能量
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  lower than the potential energy.
  低于势能
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  Pause a minute just to let that sink in.
  好好想想其中的涵义
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  The total energy is lower than the potential energy.
  总能量小于势能
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  The difference is negative. Okay?
  它们的差别是负值
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  So the kinetic energy, if that's the difference,
  如果动能是势能和总能量之间的差别
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  between potential and total, is negative.
  那这个差别就是负值
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  You never get that for p=1/2mv2. Yes?
  根据动能公式不可能得到这个结果
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  Does this violate that Ψ has to remain finite?
  是因为函数Ψ违反了有限的规定吗