When you're working on a file, it's saving constantly to RAM but also hopefully to disc, the hard disk so you don't actually lose it if the power goes off.

当你打开一个文件，它不断地保存在内存中,但对于光盘，硬盘,当你断开电源的时候，数据不会丢失。

哈佛公开课 - 计算机科学课程节选

So I'm saving this file, notice there is a few keywords that we'll come back to next week like main which is kind of the main part of my program.

保存此文件，注意这有几个关键字,我们在下周介绍,比如代表程序主体部分的“main“

哈佛公开课 - 计算机科学课程节选