He was completely unaware of the whole affair.

他对整件事情一无所知。

《牛津词典》

Jessica babbled on and on about her dance plans, completely unaware of my inattention.

杰西卡喋喋不休地唠叨着她对舞会的计划，完全没有注意到我的心不在焉。

youdao

But I'm sure there are more reasons of which I'm completely unaware.

但我保证在其中还有更多我所不曾知晓的缘由。

youdao

During the first of our consultations they seemed completely unaware of the importance of mark to market.

FORBES: Beltway Keynesians

How is it possible that the SEC was caught so completely unaware of mutual fund wrongdoing?

FORBES: Why the SEC Is In Danger of Becoming Irrelevant ( February 28, 2006 )

"Most patients are completely unaware or indifferent to what's going on, " he told reporters.

CNN: Bush to have colonoscopy under anesthesia