in fact等于短语in reality，in practice，as a matter of fact

例句

1、

I didn't fail the exam in fact I did rather well!

我没有考不及格，事实上，我考得不错！

2、

In fact， things could get worse in the short run.

事实上，事情在短期内可能会变得更加糟糕。

3、

The theory seems to have no basis in fact.

这一理论似乎没有事实根据。