translation.en: The things that have to do with what is known as our internal milieu -- for example, the whole management of the chemistries within our body are, in fact, extremely maintained day after day for one very good reason.
translation.zh: 与我们内在环境 有关的事—— 打个比方， 我们身体内整个化学反应的管理 事实上，被日日充分维持着 是有一个 非常好的理由的