translation.en: Every time you drink a glass of water, he points out, the odds are that you will imbibe at least one molecule that passed through the bladder of Oliver Cromwell.  It's just elementary probability theory.
translation.zh: 他指出，每当你喝下一杯水的时候， 你就很可能喝到了至少一个分子 是当年曾经过克伦威尔膀胱的。 这仅仅是最基础的概率论。