And Freudians have had problems with this.

即便弗洛伊德的支持者们也对此存有疑问。

耶鲁公开课 - 心理学导论课程节选

In American history our reform crusades have usually had to do with one of several objects or purposes or problems.

在美国历史上我们为理想而进行的改革,通常与如下几个目的,或意图,或者问题之一有关联

耶鲁公开课 - 美国内战与重建课程节选

We've had other economic problems that have led to recessions but it hasn't seemed to be something as potentially global as it is now.

我们经历过其他导致经济衰退的,经济问题，但是这些都不是,像现在这样全球化的问题。

耶鲁公开课 - 金融市场课程节选

Notice if I'm going to have two different sub problems I need to have two base cases here to catch this. And if I only had one it would error out. And as a consequence, I can go off and ask about rabbits. Let's see.

我需要定义两个基础事件来处理它,如果我只有一个基础事件的话就会产生错误,这样我就能够知道到底有多少只兔子了,让我们来看看，在第12个月末,没那么简单，在第二年末兔子就很多了。

麻省理工公开课 - 计算机科学及编程导论课程节选