10. As a matter of fact, ... 事实上……

As a matter of fact, he failed in the exam.

事实上，他没有通过考试。

As a matter of fact, I know nothing about you.

事实上，我对你一无所知。

She pretends to understand, but as a matter of fact she doesn't.

她假装懂了，可是事实上她并不懂。

常用英语口语