To produce snow requires both heat and cold; the first to evaporate, the second to condense John Lubbock.

雪的形成需要热和冷两个条件；前者起蒸发作用，后者起凝结作用(约翰·卢布克)。

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With this extra evidence John Snow was able to announce with certainty that polluted water carried the disease.

有了这个证据，约翰·斯诺就能够肯定的宣布，这种被污染的水携带病毒。

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John Snow, the doctor who administered the drug, is better known as one of the founding fathers of epidemiology, after he traced a deadly outbreak of cholera to a Soho water pump.

开出麻醉剂药方的医生约翰·斯诺是传染病学的开创者之一，他曾追踪一场大规模暴发的致命霍乱的病源，最后在伦敦苏荷区的一个抽水机里找到了。

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Posthumously, I would honor people like Mother Theresa, Gandhi and Dr. John Snow.

FORBES: Connect

John Snow was not the only candidate in North Carolina to fall victim to such tactics.

NEWYORKER: State for Sale

Yesterday I offered my praise for the underappreciated John Snow and my hope for incoming Henry Paulson.

FORBES: Second Thoughts on Paulson