We've had a great deal to do with it, but of course we still haven't the slightest idea what it is.

我们花了很大的功夫来接解决这个问题，但我们仍然一点都不知道语言是什么。

耶鲁公开课 - 文学理论导论课程节选

He isn't speaking at this moment yet. He isn't yet producing language.

那个时候他还不会说话，他还不知道什么语言。

耶鲁公开课 - 弥尔顿课程节选