Snow John的意思|示意

John Snow had shown that cholera was spread by germs and not in a cloud of gas.

约翰·斯诺在此之前就曾经表明，霍乱是由病菌而不是由气团传播的。

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

根据这个附加的证据，约翰·斯诺可以肯定地宣布是污染的水源传播了病毒。

John Snow wanted to face the challenge and solve this problem. He knew that cholera would never be controlled until its cause was found.

约翰·斯诺想面对这个挑战并解决这个问题，他知道只有找到霍乱的病因才能控制它。

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。

To prevent this from happening again, John Snow suggested that the source of all the water supplies be examined.

为防止这种情况再度发生，约翰·斯诺建议，所有水源都要经过检测。

Next, John Snow looked into the source of the water for these two streets.

接下来，约翰·斯洛调查了这两条街的水源情况。