She doesn't seem to have any idea of what I'm talking about.

她对我所说的似乎一点也不懂。

《牛津词典》

Do you know what I'm talking about?

你知道我在讲什么吗？

youdao

You can look at the timeline charts in the back of your textbook to see when things were invented in different cultures at about the same time to see what I'm talking about.

你们可以看看教科书后面的时间表，看看不同文化背景下同一时间发明的东西，就知道我所说的了。

youdao

Moreover, instead of having a strap he had this thing that--a rigid thing-- that you pull out from this-- you know what I'm talking about?

而且他也没用皮带,而是用的现在大家都知道的把手去拖-,你们知道我说的什么吧？

耶鲁公开课 - 金融市场课程节选

what I'm talking about is a space, a safe space in our lives with our closest friends, with our family, first and foremost, with ourselves, will we have the permission to be human.

我的意思是一个空间，生活中的私密空间，和挚友一起时，和家人在一起时，最重要的是面对自己时，我们要准许自己为人。

哈佛公开课 - 幸福课课程节选

Do you know what I'm talking about?

你们知道我在说什么吗

耶鲁公开课 - 基础物理课程节选

"It's a living, breathing example of the heart of my message, what I'm talking about, " Edwards said.

CNN: Edwards' voters up for grabs

If you've ever been on Bourbon Street in New Orleans, you would know what I'm talking about.

NPR: Building a Museum for B.B. King

By the way, I'm 5'6 and 120 pounds so I do think I know what I'm talking about.

BBC: Are our children becoming couch potatoes?