他可能不知道这是什么东西，但他知道这能让我开心。

He probably didn't know what it was, but he knew that it made me happy.

youdao

我根本不知道这是什么状况。

I don't have the slightest idea, what is going on here.

youdao

我不知道这是什么，但是这首歌真的打动了我。

I don't know what it was, but the song really hit me.

youdao

If you don't have the units, then if you say the answer is 19, then we don't know what it means.

如果没有的话,比如你的答案是十九,那我们就不知道这是什么意思

耶鲁公开课 - 基础物理课程节选

She says that she has read a little bit of Kafka and "doesn't know what to make of him, but it makes you a bolder writer."

她说她读一点点卡夫卡的作品,而且“不知道是什么造就了卡夫卡，但这可以让自己成为,一个更大胆的作家“

耶鲁公开课 - 1945年后的美国小说课程节选

Maybe you don't even know what this-- do you all know what carbon paper-- I guess you do know what this is, right?

或许你们甚至都不知道这是什么东西-,你们都知道复写纸吗-,我猜你们都知道这是什么，对吧？

耶鲁公开课 - 金融市场课程节选