In face I don't know中文意思是什么?

In face I don't know中文意思是什么?
In face I don't know中文意思是什么?

In face I don't know中文意思是什么?
事实上我并不知道（或并不了解）
就这样,挺简单的,希望可以帮到你.

In fact, I don't know.

事实上我不懂