translation.en: You know, if you take the entire universe of all chemical reactions in the human body, every chemical reaction that your body is capable of, most people think that that number is on the order of a million.
translation.zh: 现在如果把你体内 所有可能的化学反应 都列举出来组成一个大集合 大部分人都会觉得至少得上百万种反应。