I was unaware of his existence until today.

直到今天我才知道有他这么个人。

《牛津词典》

I was unaware that I hurt him.

这都是你不知道保护自已的缘故。

youdao

I was unaware of his anger.

我没有意识到他的怒气。

youdao

Was Plato simply unaware of this, I can't believe that.

柏拉图却没有注意到这点，我不相信。

耶鲁公开课 - 政治哲学导论课程节选

On the other hand, I uncovered some important and approachable influencers of which I was unaware.

FORBES: Mining Influentials

Until the subject of the SF anti-circumcision motion came up, I was unaware of the phenomenon of foreskin envy.

FORBES: I'm Not Making This Up Dept.: San Francisco Mulls Ban On Circumcisions

"I believe what I said was that I was unaware of the Lippo contract until it became public, " Clinton said.

CNN: Clinton Defends Bowles, McLarty Calls For Hubbell