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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  He'd actually -- Newton had done this work in the 1660s and '70s,
  这本书牛顿从1660年代写到70年代
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  but he didn't publish it until Hooke died
  但直到胡克死掉他才将书出版
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  because he didn't want Hooke to get on his case, criticizing it.
  是因为他不愿胡克来评头论足
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  But in the Second Edition, in 1717, he put some additional material;
  在1717年的第二版中他增加了些内容
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  you see, "with Additions."
  这里写着'增订版"
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  And the additional material, even though the book is about optics,
  尽管这本书是关于光学的
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  the additional material is about chemistry.
  补充进来的内容却是关于化学的
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  And it's at the end, and posed not as hypotheses but as questions,
  它们作为疑问而非假设在书末尾提出
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  because Baconian people, following Francis Bacon,
  因为彼时弗兰西斯·培根的追随者们
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  weren't supposed to make hypotheses, but they could ask questions.
  都不事假设 但却爱提问
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  So here are some of the questions.
  这里就是其中的一些问题
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  Question thirty-one, the one that has most to do with chemistry:
  问题31是与化学关系最密切的一个