I know it's difficult to do that.know about怎么用

问题描述:

I know it's difficult to do that.
know about怎么用

I know it's difficult to do that.对吗正确know about怎么用know about 知道(听说的那种).know about 译为“了解”,“知道……情况”.如:...There's one thing I'd like to know about.有一件事我想了解一下.I ...