And so there is this critical school that says, "I won't believe anything unless it is proven to me."

有批评家指出,"我不会相信没有证据的历史"

耶鲁公开课 - 古希腊历史简介课程节选

And Joe Jackson had this song which had the lyric, like, you can't get what you want unless you know what you want.

杰克森有句歌词这么写的,汝欲求之,必先知之

耶鲁公开课 - 博弈论课程节选

I will be happy to admit that I read through this I probably cannot tell you what it did unless I really obsessed over these details.

我不得不承认，恐怕我读完后,也不能告诉你它都干了些什么,除非我完完全全被这些细节给迷住了。

哈佛公开课 - 计算机科学课程节选

Unless you take the things that you don't like about this world and you flip them upside down and you can start that today.

除非你把在这世上讨厌的事物,翻转过来，你们可以从今天开始。

哈佛公开课 - 幸福课课程节选

So we may live, in your lifetime, to a time when this burden of Southern history may get all but lifted altogether from Southerners, unless we don't forget the Civil War.

也许我们,在有生之年,不会看到这段历史给南方造成的阴影,完全消散,除非我们将内战遗忘

耶鲁公开课 - 美国内战与重建课程节选