I mean maybe up the street we whisper, but here we know it. And, so here is a different kind of system where we have a constant external pressure.

或许在街上你们低声细语，但在这里不应该这样，这是另一个系统,我们有一个恒定的外压强。

麻省理工公开课 - 热力学与动力学课程节选

It turns out on a Linux system there's this command called "man" for manual page.

结果是在一个Linux系统中，这里有这样一个叫做“man“的命令,用来显示指南手册的。

哈佛公开课 - 计算机科学课程节选