in fact,
really,truly
· I thought Betty was in the garden,but in fact she was in her room.
我以为贝蒂在花园,其实她在自己的房间里.
· In fact the earth is actually a bit nearer to the sun during our winter.
在冬天地球离太阳实际上还要近一些.
· No one believed it,but in fact,Mary did pass her exam.
尽管没有人相信,但实际上玛丽确实考试及格了.
in fact可作状语或表语 ,可单独使用,既可用于书面也可用于口语中.