Let me give you, I'm going to create, q a polar point, I'm going to call it q, and we'll give it some random values.

让我给大家讲解下，我要去创建，一个极坐标点，然后我会去命名它为，然后我给它赋一些随机的值，好，现在我想知道。

麻省理工公开课 - 计算机科学及编程导论课程节选

Having created this thing called Cartesian point, I'm going to create two instances of it.

这里面是控的,好，我们一会就会来完善它，但是类的概念就是。

麻省理工公开课 - 计算机科学及编程导论课程节选

And that's a wonderful thing to have because it gives you that modularity, that encapsulation that basically says, when I create a point, the only way I can get at the values, is by using one of the defined methods, in this case it could be Cartesian, Cartesian and get all the pieces of that.

这是很棒的一件事情,因为它让你有了，模块性以及封装性，这基本上也就是说，当我创建了一个点，我能够得到它的值的唯一的方式，就是用一个定义好的方法，在这个例子中也就是。

麻省理工公开课 - 计算机科学及编程导论课程节选