来自《耶鲁大学开放课程：新生有机化学 第2集 第2集》

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  that you could break open
  我们可以把这些环也打开
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  and make it seven valent, or nine, or eleven?
  得到七价 九价 甚至十一价的氮呢
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  Or maybe you could break a loop into three.
  又或者 一个环还可以拆成三价
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  So might latent valence loop explain the trivalence and pentavalence of nitrogen,
  潜价环可以将氮的三价态 五价态
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  or the amine-HCl reactivity?
  还有氨和盐酸的反应统统解释清楚吗
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  The trouble is it's too slippery a concept.
  问题在于这个概念太全能
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  It explains everything.
  用它什么都说得通
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  You could explain anything you wanted to.
  你想怎么说就能怎么说
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  You could explain eighty-four valence of nitrogen or something.
  你可以把氮说出84个价态来
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  Anything that comes along, you'd say,
  无论遇到什么 你都可以说
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  "Ah ha, there are that many latent valences."
  啊哈 这里有不少的潜价
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  But how do you know there are not more?
  但究竟有多少呢