When we talk about space, what we usually refer to is, how much computer memory does it take to complete a computation of a particular size?

我们经常指的是，当我们计算，一个特定大小的问题的时候,要占用计算机的多少内存？

麻省理工公开课 - 计算机科学及编程导论课程节选

Because you can come up with an infinite number of values but if you have a finite amount of space and certainly a computer has a finite amount of disk space or RAM, you have to make approximations.

你可能会碰到一些无限的值,如果你只有有限的空间,废话，电脑当然只有一个有限的磁盘空间,或RAM，我们得做一些近似处理。

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