释义：
what you're talking about 你说的事情
虽然是比较长的句式，但 what you're talking about ( 你说的事情）或 what I'm talking about ( 我说的事情 ) 都经常会和 know 等动词相结合，一起使用。
例句：
I know what you're talking about.
我知道你在说什么。
This is exactly what I'm talking about.
这就是我想说的。
You know who I'm talking about.
你知道我说的是谁。
I have no idea what you're talking about.
我搞不清你说的东西。
对话：
A: I saw you out with another woman.
我看见你和一个女人出去了。
B: I don't know what you're talking about.
我不知道你在说什么。
