"If we don't get a level of legitimacy and governance, then all the troops in the world aren't going to make any difference,".

VOA: standard.2009.11.04

Notice one last piece. If I'm going to do that, run through all possible answers, I still want to know, gee, what if there aren't any answers? How do I return that case?

注意最后一段，如果我要这样做，也就是运行所有可能的答案，我还是想知道要是没有结果呢？,在这个例子中应该返回什么呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

But we also hope that there aren't any students here who are over-qualified for this course.

但是我们还希望没有学生具有,比这门课的要求还高的水平。

麻省理工公开课 - 计算机科学及编程导论课程节选

We can't conclude that until we know that there aren't any competitors, that there isn't anybody else right now who also has the same personality.

我们不能妄下定论，直到确定没有其他竞争者，确定目前没有其他任何人拥有相同的人格。

耶鲁公开课 - 死亡课程节选

One way that that's done is by introducing genes into cancer cells, genes that aren't normally expressed in any mammalian cell, but that will cause the cancer cell to die.

已经成功应用的一种方法是,将基因导入癌细胞,而这种基因通常不在哺乳动物细胞中表达,但是可以导致癌细胞的死亡

耶鲁公开课 - 生物医学工程探索课程节选

And if the other countries aren't going to cut down on their fishing, then you want to catch the fish now, because there aren't going to be any there tomorrow.

如果其他国家不打算减少捕捞量,那么你现在就想先把鱼都捞起来,因为没准明天就会无鱼可捞了

耶鲁公开课 - 博弈论课程节选

That is, in real life, the variables that you'd normally control aren't some combination of entropy and these variables, but really their temperature, volume and pressure, any couple of those, might be what you'd really have under experimental control.

在生活中，我们所能控制的,不是熵和其他变量的组合，而是温度，体积，压强，以及其中的两两组合,这些才是试验中所能控制的。

麻省理工公开课 - 热力学与动力学课程节选