I don't know him.

我不认识他。

youdao

I don't know him. '.

我不认识他。

youdao

I don't know him—he's a perfect stranger.

我不认识他，他是百分之百的陌生人。

《牛津词典》

"One soldier had been fighting in the jungles for years. And I don't know if it had affected him or not, but when the clerk handed him a tweed suit to try on he spent three hours searching through the fuzz for snipers."

VOA: special.2009.03.09

Some people said of him in real life he had a little button nose. I don't know from some pictures of the look, if they were without make-up.

有人说在现实生活中，他的鼻子,有一点塌，我不知道是否有,没画过妆的照片上有他原本的样子。

麻省理工公开课 - 电影哲学课程节选

I don't know him at all.

我不认识他。

麻省理工公开课 - 电影哲学课程节选

"I've seen Andy since 1996, and I don't know if I've ever seen him not have his slider, " Girardi said.

WSJ: Yankees' Pettitte struggles against Astros

Do you think that a generation from now we'll be having entirely different conversations, hopefully a first spouse - first man, perhaps I don't know what you'd call him, perhaps a first gentleman.

NPR: Candidate's Wives Put Under the Microscope

Maybe in a few years I'll have to run against him, I don't know, so I'll take that back.

CNN: Not losers: Trump praises Tom Brady, Kanye West - CNNPolitics.com