touché! continued...

重新听了一下Apple的TV AD：touché。但是依然不知道怎么准确理解之~~

Mac: Hello, I'm a mac.
PC: And I'm a PC.
Mac: And I'm a PC, too.
PC: And I, ... What?
Mac: Yes. You know you can run MacOS X or Windows on a Mac. So in a way I'm a kinda like the only computer you ever need.
PC: Well, touché!
Mac: Ah,... I don't think you're using that right.
PC: touché! Hahaaaha...
Mac: Now listen, since you don't say touché if you make a point that I make a counter point. So you see, I said I run Windows but you haven't made a point yet.
Mac: Let's try it again.
Mac: You can get a mac and still run all your windows stuff.
PC: touché?
Mac: Never mind...

红色部分是我没有听清楚地地方。touché到底是什么意思，依然是个谜。