translation.en: So we naturally tend to think, because we see language written so often, that that's what language is, but actually what language is, is speech. They are two things.
translation.zh: 所以因为我们经常看到写出来的语言， 我们就很自然地认为，那就是语言， 但实际上语言是言语对话。这是两个不同的事物。