translation.en: Basically, a human body is a conversation going on, both within the cells and between the cells, and they're telling each other to grow and to die, and when you're sick, something's gone wrong with that conversation.
translation.zh: 基本上，人体 是个 在细胞里和细胞间的持续对话， 细胞们告诉对方该长大还是该消失。 当你生病时， 这种对话就出错了。