infact事实上．
in fact 为介词短语，意为"实际上、事实上"，可在句中作状语．In fact，she was in her room．事实上，她在自己的房间里．
in fact 事实上、实际上
【例句】
I thought I was going to be late, but in fact I was early.我本以为我要迟到了，但事实上我早到了。
In fact, the lecture was very interesting.事实上，讲座非常有趣。
1. in fact这个词组在句子中的位置非常灵活，放句首句尾或者当中都可以。
