So you can actually say, how do I know which methods are associated with the class? For that, we can call dir. And what it does, is it gives me back a listing of all the things, dir all the methods, that are associated with it.

我们开始建立类了，我们得到了这些方法,因此实际上你可以说，我怎么知道，哪些方法是关联与这些类的？,为了解决这个问题，我们可以调用，这个方法的作用。

麻省理工公开课 - 计算机科学及编程导论课程节选

A lot of people don't recognize this as marketing, but there are many other forms that we'll talk about in the class, some of which you probably don't even know about, and it's some of which you probably see but don't code it as marketing.

很多人把这不看成是营销,我们在这门课当中,还会讲其他方式的营销,其中有一些你们甚至都不知道,有些方法你们可能见过,但没把它当做营销

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选