translation.en: So, there's all kinds of bacteria on the Earth that have no business being in you or on you at any time, and if they are, they make you incredibly sick.
translation.zh: 地球上有无数种细菌 它们有些在任何时候都绝对不应该出现在你的体内体表， 然而假如你不幸遇到了, 那你一定会病得很厉害。