So I wrote a little program called "chart" that, based on some data I happened to hardcode into the program, shows us their numbers for the past several years.

我写了一个叫做“图表“的小程序，基于我在程序中硬编码的一些数据，向我们显示在过去几年中我们课程的人数。

哈佛公开课 - 计算机科学课程节选

So the end result, because someone wrote this function years ago is that printf takes this thing, takes this thing, David plops David inside the middle of that formatted string and then renders the whole result.

基于这是某人多年以前写的程序,最终的结果是打印出这个，这个，在格式化字符串中间的,然后返回结果。

哈佛公开课 - 计算机科学课程节选

So, for example, if I say TEST and I don't give it a start but I give it an end, then it gives me all the elements up to that point.

例如，我创建了TEST这个元组我没有给他,起始点却给了它一个结束点,然后程序会基于这一点放置所有的元素。

麻省理工公开课 - 计算机科学及编程导论课程节选

But when you start writing programs, especially when we get to web-based stuff where you want -- to check the user's input -- is it valid, is it an email address, -- and all these different scenarios -- it's actually often useful to be able to just enumerate them or rattle them off using this switching construct instead.

但是当你看是写程序时，特别是当我们,使用基于网络的东西，你想要,检查用户的输入-,它是合法的吗？它是不是一个电子邮箱地址？,所有的这些场景-,实际上它常常是有用的，当你用枚举结构列举它们,或者用它来快速地来说出它们。

哈佛公开课 - 计算机科学课程节选