But my guess is there're American Jews who have never met a Palestinian.

但我猜很多美国犹太人,从来没有见过巴勒斯坦人。

普林斯顿公开课 - 人性课程节选

So they've got these superhighways which is, I don't know if you've seen them, they are marked on in blue.

所以，他们修了这些高速路，我不知道你见过没有，他们被标成蓝色了。

伦敦的蓝色自行车 - SpeakingMax英语口语达人

If you have not seen the calculus that I'm about to use on the board, or more likely, if you've forgotten it since high school, don't panic.

如果你们没有见过我将要,在板书上写的表达式,或者说,高中毕业你们就忘了,没关系

耶鲁公开课 - 博弈论课程节选

I've never seen prose like this," you say.

我从来没有见过这样的文章“

耶鲁公开课 - 文学理论导论课程节选

All right. So you probably read in the book that the bassoon is a double reed instrument, and so just to show you what that looks like-- You've probably seen it but if you haven't, two pieces of wood vibrate together when I blow through them.

好的,你们可能在书上看到过,巴松管是个双簧乐器,我将为你们演示双簧怎样演奏,你们可能见过,如果没有请看我演示,我吹奏时,两个木片会一起震动

耶鲁公开课 - 聆听音乐课程节选

So I would mention those to him before I mention Martin King because I never met Brother Martin. I read about him.

因此在提到Martin，King之前我要先提到他们,因为我从来没有见过Martin，我只读到过他。

普林斯顿公开课 - 人性课程节选