So the special active file keeps track of whatever you missed.

因此这些特殊的文件保持着它的轨迹。

哈佛公开课 - 计算机科学课程节选

include cs50 h But this says include and this says include a file called cs50.h that lives in some special place on the server that the cs50 staff wrote.

这里写在,众所周知，cs50，h是由CS50的员工,编写的一个库文件。

哈佛公开课 - 计算机科学课程节选