I know about it, but never tried performing it.

我知道它，但是从没有施行过。

youdao

Everything I know about it I picked up from the same sources you did.

对于该动向，我了解信息的渠道与各位完全一样。

youdao

I don't know much about it, so I don't feel qualified to comment.

关于此事我所知不多，所以觉得没资格评论。

《牛津词典》

"I'm very happy about it." "I don't know whether this will be my main stopping point or not, but it certainly does give meanother option."

VOA: standard.2010.07.28

What I know about it is what you're kind enough to read.

我所了解的内容只供给你们阅读

耶鲁公开课 - 欧洲文明课程节选

I was kind of skeptical because, you know, you just hear about how bad it is and how sketchy but,

我有点怀疑，因为你知道，总是能听说交通多么不完善，

利用大众交通工具吧 - SpeakingMax英语口语达人

"That's all I know about it, " Mary Butler said, adding she'd been trying to call since she'd first heard of the explosions.

NPR: Loved Ones Seek Word On Boston Runners After Blast

Before she could get seated, I asked her what she knew about the golden ratio and began to spew everything I know about it.

CNN: Asperger's: My life as an Earthbound alien

So, all I know about it is the kind of well-known buzz about it, which is that it's Will Smith's first, you know, serious role.

NPR: Let's All Go to the Lobby: Holiday Movie Preview