So when I said earlier that as soon as swap returns, all of the memory allocated for swap is now useless.

我前面指明的，一旦swap返回，所有为swap分配的内存都是无用的了。

哈佛公开课 - 计算机科学课程节选

Now as an aside, I'll admit this is a completely useless program, much like the first couple of ones we did because why would you write a program just to solve this?

说点题外话，我承认这是一个完全无用的程序，跟我们之前写的两个程序一样,我们为什么需要写个程序来解决这个数学运算呢？

哈佛公开课 - 计算机科学课程节选