I thought, Who is that man? I didn't know you.

我在想，那个男人是谁？我不认识。

耶鲁公开课 - 现代诗歌课程节选

I didn't know anybody that was going to Germany,

刚去德国的时候，我谁都不认识，

留学的优点是？ - SpeakingMax英语口语达人

Yeah this is Lincoln apparently. Who knew, Lincoln?

很显然,这是林肯,谁认识林肯啊

耶鲁公开课 - 博弈论课程节选