know-nothing

I know nothing at all about the recent happenings there.

里近来发生的事我一点儿也不知道。

This might seem very perplexing to those who know nothing about it.

这些它一所知的人来说可能显得很难理解。

He knows nothing of unprofessional matters.

与专业关的事, 他什么也不知道。

I hasten to add that I knew nothing of the fraud at the time.

我忙不迭地补充说，我当时骗局一所知。

However, we can know nothing through this process about the "numina" (inward realities) of nature.

但是，在这一过程中，我们自然界的“numina”（内在现实）依然毫所知。

He closed up when he found he knew practically nothing about the subject under discussion.

当他发现自己所讨的问题实际上一所知时, 就不再开口了。

I know nothing but Wikipedia is a cyclopedia which is easy to use,free and grow continuously.

我只知道维基是一非常好用的，免费的，不断成长的百科全书。