I have a general idea what he is talking about.

我大致知道他在谈什么。

youdao

Sometimes when he is very upset I don't understand what he is talking about but I understand the tone and I just walk away.

有时当他很心烦时，我不懂他在说什么，但是我知道他的语气，我走开就好。

youdao

When you let someone teach you something, you are telling the person that you respect their talent, time and that you believe he knows what he is talking about.

当你让别人教你东西时，你是在告诉别人你尊敬他的天赋、时间，你相信他的话。

youdao

He brings it up as if we know that this is what he's been talking about all the time.

他提出这个好像我们知道一样,这是他一直在说的东西。

耶鲁公开课 - 现代诗歌课程节选

In other words, what is there--which is a kind of way of talking really has to do with what Gadamer means when he talks also about die Sache, the subject matter.

换句话说，存在,确实和伽达默尔所说的,事情本身有联系。

耶鲁公开课 - 文学理论导论课程节选

There is no way to talk about what he's talking about in the kinds of settlements that existed before the invention of the polis, and that I think is worth mentioning.

因为他是无法,在城邦出现前谈论,这种存在形式的居住地的,我认为这一点很值得注意

耶鲁公开课 - 古希腊历史简介课程节选

That is clearly what he is talking about, and the behaviour he is seeking to justify.

FORBES: Conclusion

As a former president of Texas Instruments Japan, Mr Ishikawa presumably knows what he is talking about.

ECONOMIST: Semiconductors

When you vote for a representative without bothering to ascertain if he knows what he is talking about, you get Dr. Harris.

FORBES: Conservative GOP Freshman Wants His Government Health Care-Now!