来自《耶鲁大学开放课程：1600年后西方社会的流行病 第10集 第10集》

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  The bacterium would gain access to the municipal water supply,
  细菌会由城市供水传染
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  and there would also be the danger of swimming,
  同时 游泳及食用
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  or of eating shellfish that fed on sewage,
  以下水道污物为生的海鲜也有感染的危险
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  especially if the custom was to eat it raw.
  尤其当人们有生吃的习俗时
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  The disease would then spread along inland transportation networks.
  疾病会沿着内地的交通运输网而传播
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  We've said too that cholera was a disease of urbanization,
  我们曾说过霍乱是一种城市化疾病
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  and of a defective urban infrastructure,
  尤其当这个城市的基础设施存在缺陷
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  without sewage systems.
  没有下水道系统时
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  And remember, in the nineteenth century,
  有一点我们要记住 十九世纪时期
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  waste in European cities was predominantly thrown into the streets,
  在欧洲 人们经常将垃圾直接弃于街道
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  where there would be a seepage downward into tank wells;
  其中的污水直接往下渗流到贮水池和井里
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  that people would then drink the water and its bacterial bounty.
  这样 人们会通过饮水直接饮入了细菌物质