and 21 Broad Street and 8 and 9 Cambridge Street) had had no deaths. He had not foreseen this, so he made further investigations. He discovered that these people worked in the pub at 7 Cambridge Street. They had been given free beer and so had not drunk the water from the pump. It seemed that the water was to blame.
首先，他在一张地图上标明了所有死者住过的地方。这提供了一条说明霍乱起因的很有价值的线索。许多死者是住在宽街的水泵附近（特别是这条街上16、37、38、40号）。他发现有些住宅（如宽街上20号和21号以及剑桥街上的8号和9号）却无人死亡。他以前没预料到这种情况，所有他决定深入调查。他发现，这些人都在剑桥街7号的酒馆里打工，而酒馆为他们免费提供啤酒喝，因此他们没有喝从宽街水泵抽上来的水。看来水是罪魁祸首。
Next, John Snow looked into the source of the water for these two streets. He found that it came from the river polluted by the dirty water from London. He immediately told the astonished people in Broad Street to remove the handle from the pump so that it could not be used. Soon
afterwards the disease slowed down. He had shown that cholera was spread by germs and not in a cloud of gas
接下来，约翰·斯洛调查了这两条街的水源情况。他发现，水是从河里来的，而河水被伦敦排出的脏水污染了。他马上叫宽街上惊慌失措的老百姓拆掉水泵的把手。这样，水泵就用不成了。不久，疫情就开始得到缓解。他证明了，他证明了霍乱是由病菌而不是由气团传播的。
In another part of London, he found supporting evidence from two other deaths that were linked to the Broad Street outbreak. A woman, who had moved away from Broad Street, liked the water from the pump so much that she had it delivered to her house every day. Both she and her daughter died of cholera after drinking the water. With this extra evidence John Snow was able to announce with certainty that polluted water carried the virus.
在伦敦的另一个地区，他从两个与宽街暴发的霍乱有关联的死亡病例中发现了有力的证据。有一位妇女是从宽街搬过来的，她特别喜欢那里的水，每天都要派人从水泵打水运到家里来。她和她的女儿喝了这种水，都得了霍乱而死去。有了这个特别的证据，约翰·斯洛就能够肯定地宣布，这种被污染了的水携带着病菌。
To prevent this from happening again, John Snow suggested that the source of all the water supplies be examined. The water companies were instructed not to expose people to polluted water any more. Finally "King Cholera" was defeated.
为了防止这种情况的再度发生，约翰·斯洛建议所有水源都要经过检测。自来水公司也接到指令，不能再让人们接触被污染的水了。最终，“霍乱王”被击败了。
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