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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  what could you do to simplify things?
  怎么来简化方程呢
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  Knock out Ψ. But HΨ is not H times Ψ.
  把Ψ约掉就行了 但那不是H乘以Ψ
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  H is sort of recipe for doing something with Ψ;
  H是对Ψ进行某种操作[算符]
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  we'll see that right away.
  我们马上就会讨论
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  So you can't just cancel out the Ψ, unfortunately.
  所以Ψ不能被消除
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  Okay, so ΗΨ=EΨ. Oops sorry, what did I do,
  所以还是ΗΨ=EΨ
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  Now we can divide, you can divide the right by Ψ,
  但等式两边可以同除以Ψ
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  and since it was E times Ψ,
  因为右边是乘法
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  the Ψ goes away.
  所以Ψ被消掉
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  But when you divide on the left, you don't cancel the Ψs,
  但去除左边 你消不掉Ψ
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  because the top doesn't mean multiplication.
  因为分子部分不是乘法
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  Now I already told you the right side of
  已知等式的右边