来自《耶鲁大学开放课程：1600年后西方社会的流行病 第11集 第11集》

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  --under the soil of cities in this period,
  这些都被安装在城市地下
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  and one of the technological inventions
  其科技发明之处之一在于
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  --was to make the sewers egg shaped,
  使下水道呈蛋形
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  so that you would maximize the flow and they would be self-cleaning
  这样可以使流量最大化并具有自我清洁功能
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  and they would drain most efficiently.
  也会最具效率地排空污水
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  So, technological innovations of that sort were part of it.
  因而 这属于科技创新的一部分
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  Now, the victory of Chadwick's vision of public health
  查得维克公共卫生理论的成功
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  wasn't simply automatic,
  并不是自然而然得来的
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  and so it was worth to keep alternatives in mind.
  因而它是值得被记住的
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  His side was the winning side in a debate
  在一场关于十九世纪早期的辩论中
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  --of the early nineteenth century,
  他这一方获胜了
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  and a wider view, like that of Virchow, was present,
  而论点更为广阔的一方 如维尔柯夫思想