And again, this points out something I wanted to me-- I mentioned last time, list can be heterogeneous, in the sense that the elements can be multiple different types.

这儿又指出了一点我想要告诉大家的,我上节课也提到了，就是数组是多相的,也就是说元素可以是多种类型的。

麻省理工公开课 - 计算机科学及编程导论课程节选

And we're going to start with one that you many of you, have already bumped into perhaps by accident, which are lists.

曾经遇到过的,可能是偶然遇到的类型来开始,就是数组，数组和字符串类型。

麻省理工公开课 - 计算机科学及编程导论课程节选

Right, and just to get a sense of this, let's look at a simple little example, so on your hand-out, you'll see I've got a little piece of code that says assuming I've got one of these points, I want to do things with it, for example I might want to add them together.

这些数组中的一个，你怎么能够知道，它是哪种类型的呢？,你怎么知道它是以笛卡尔坐标,表示的还是以极坐标,形式表示的呢？,你没有可以用来区分的东西，你没有说明这种信息,聚集实际上的意义。

麻省理工公开课 - 计算机科学及编程导论课程节选

As a consequence, I have a list of ints.

是由integer类型组成的数组。

麻省理工公开课 - 计算机科学及编程导论课程节选