来自《耶鲁大学开放课程：1600年后西方社会的流行病 第13集 第13集》

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  the final version of which--it
  你们读的是这本书的最后一版
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  was first drafted in 1849,
  该书第一次发行于1849年
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  but the draft that you have appeared after this event.
  但你们看的版本是1854年霍乱之后的
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  And this was the classic statement of the contagionist view,
  这是经典的有关接触性传染的观点
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  to the extent that it could be supported
  它一定程度上可以无需决定性证据即成立
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  without the definitive evidence later provided by microscopy.
  后来显微术提供了这些证据
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  So, Snow did everything that it was possible to do,
  所以斯诺几乎做了
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  purely on the basis of epidemiological evidence.
  流行病学证据上的全部基础工作
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  There was going to need to be a conceptual shift in order to
  接着就需要概念转换
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  clinch his view and demonstrate it
  来决定这个观点并论证它
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  so that it was broadly accepted.
  以使得它被广泛接受
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  On the other side, we see a book that's been--it's
  另一方面 我们还读过