It's hard to answer questions and whatnot and you don't necessarily have access to the same tools unless you yourself go through the process of configuring your machine manually by following many long sequences of steps.

所以很难说会出现什么情况,你们不能,用同一台机器，除非你们自己按照一系列,冗长的步骤手工配置,你们自己的电脑。

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

I don't expect you to learn that, or even retain it unless I explain the concepts in class, or unless they're explained quite well in the paper itself.

我不要求你们掌握这个,更别提记忆了,除非我在课上做了讲解,或者它们在文章中解释的非常透彻了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The incentive in Washington is such that it's virtually impossible to cut spending unless you can go to the voters " and say "We don't have the money."

政府的机制就是这样,削减财政开支，几乎不可能,除非你有勇气对选民说,“政府没钱了“

斯坦福公开课 - 经济学课程节选