这年头谁还只有一个电子邮箱地址呢？

Who has only one E-mail address these days?

youdao

然而，现在所有的大学新生甚至在他们从小学毕业之前就拥有了一个电子邮箱。

Now, however, virtually every new college student got an email address before even graduating from primary school.

youdao

你可以用一个Battle.net电子邮箱发送或接收并接受一个电子邮箱邀请。

You can send or receive and then accept an email invite with a Battle.net email.

youdao

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