I know of at least two people who did the same thing.

我知道至少有两人干过同样的事。

《牛津词典》

He did not instigate the coup or even know of it beforehand.

他没有发起政变，甚至事先都不知道。

《柯林斯英汉双解大词典》

I don't know of any vacancies in the company but I'll ask around.

我不知道公司有没有空缺，不过我会打听打听。

《牛津词典》

The judge said. "The emperor has hurt no one that I know of."

VOA: special.2009.12.14

The worship practices of ancient Israel and Judah clearly resemble what we know of Canaanite and Ancient Near Eastern worship practices.

古代以色列和犹太崇拜仪式非常像,我们所知的迦南和古代近东的崇拜仪式。

耶鲁公开课 - 旧约导论课程节选

Well, I don't really know of a whole lot because I don't really research things and pay attention.

嗯，我知道的不是很多，因为我不经常关注调查这些事。

积极参与俱乐部活动 - SpeakingMax英语口语达人

"I know of at least one set of negotiations that is going on, " he said.

CNN: Taiwan's Ticking Clock

We may live and work in a knowledge economy, but do we know of our freedom.

FORBES: 42 Miles Of Echo Taps: A Memorial Day Tribute

The closest analog I know of is when you suddenly become aware of a ticking clock.

FORBES: What Its Like to Be (Momentarily) Blind