许多十几岁的女生每天迫不及待地从学校回家，和刚刚才分开的同学上网聊天。

Most kids use computers to play games (some for 30 hours or more a week), and many teenage girls think nothing of rushing home from school to have email chats with friends they has just left.

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OK. And how do I create them? Well, the representation is, following a square bracket, followed by a sequence of elements, separated by commas, followed by a closed square bracket.

就是一个有序的序列，好，那么我们怎么创建元组呢？,好，表达式是，一个方括号，后面是一系列的元素，以逗号分开,以一个闭方括号结束，这就是我刚才所说的。

麻省理工公开课 - 计算机科学及编程导论课程节选

So I'm going to distinguish in fact between un-handled exceptions, which are the things that we saw there, and handled exceptions. I'm going to show you in a second how to handle them, but let's look at an example.

所以我打算区分开不可处理的异常,以及我们刚才看到的,可以处理的异常,我一会要给你们演示下如何处理他们,给你们看一个例子。

麻省理工公开课 - 计算机科学及编程导论课程节选