I must have knowledge to speak English.

我必须具有知识来说英语。

youdao

I must have knowledge to write a letter, and so on, everything.

我必须具有知识来写信，等等，每件事情。

youdao

So knowledge is necessary to act in the sense, my going home from here to the place I live; I must have knowledge.

因此，知识是必要的在行动的意义上，我回家，从这里到我的住处，我必须具有知识。

youdao

One question is this: Is it really true that in order to think about the perfectly straight, I must have somehow, somewhere at some point come up against, had direct knowledge of, the perfectly straight?

一个问题是,难道真的说,为了想象一条完美的直线,我必须,在某处直接碰到,并直接了解一条完美的直线吗

耶鲁公开课 - 死亡课程节选