一无所知

He may be rich for aught I know.

也许有钱但一无所。

I regret my ignorance on the subject.

很遗憾, 对此问题一无所。

He displayed a willful ignorance of their plight.

对于们困境故意装作一无所。

He was a little vague when I asked what had happened.

问出了什么事时，一无所。

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

这对那些对它一无所人来说可能显得很难理解。

We are still woefully ignorant of the causes of this disease.

不幸是，们仍对这种疾病致病原因一无所。

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

忙不迭地补充说，时对那个骗局一无所。

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

发现自己对所讨论问题实际上一无所时, 就不再开口了。

As I opened up the computer to try and fix the problem, I realized that I was getting into completely uncharted waters and considered whether to leave it to the experts.

打开电脑打算修理它时，意识到这是一个自己一无所领域，于是考虑要不要请专业人员帮解决。