I don't know the man.

我不认识这个男人。

youdao

I don't know the man in the black hat.

我不认识那个戴着黑帽子的那个人。

youdao

I don't know the man standing at the gate.

站在大门口的那个人我不认识。

youdao

In fact, I don't know if in the news the pioneer in this is a man named Judah Folkman, who is a surgeon who first speculated that this was important, and sadly he died on Monday, but had a dramatic impact on our understanding of how cancers develop in people and new approaches.

实际上,我不清楚这个新闻中提到的人,是不是犹太?福克曼,这个领域的先驱,他是个外科医生,最先提出了这个重要的理论,不过不幸的是他在本周一去世了,他让我们对癌症有了新认识,带给我们治疗癌症的新思路

耶鲁公开课 - 生物医学工程探索课程节选

The truth is I don't know the man well.

BBC: Fan power sends Megson packing

"I don't know, man, it's like the weirdest thing I ever seen, " says Gomez.

NPR: Uneasy Black-Latino Ties a Factor in Calif. Primary