Don't think of it as a specific box into which we're putting things; think of it as a link to a value.

别把它想做是,我们放东西的一个箱子;,把它当做是一个指向值的链接。

麻省理工公开课 - 计算机科学及编程导论课程节选

So that is a flag that tells the compiler that I want to use or link into my own program code that someone else wrote that lives somewhere else on the system whose moniker is CS50.

所以那是一个标记，用来告诉编译器我想使用,或连接我自己的程序代码到一个叫做CS50的系统中的程序,可能其他人在那个系统写了这些程序。

哈佛公开课 - 计算机科学课程节选