When I call the class definition, that is I call c point, I'm going to call it with a specific set of arguments.

来创建实例的时候，也就是调用c，point的时候，我会以一个特定的参数集来调用它,然后将要发生的就是init将会被应用。

麻省理工公开课 - 计算机科学及编程导论课程节选

Well, unfortunately in C, you have to be ever so specific as to what you wanna put in the variable.

很不幸，在C语言里，给变量赋值之前,你必须搞清楚它的数据类型。

哈佛公开课 - 计算机科学课程节选

c We know it's very specific for light because in this equation is c, the speed of light. So any time you go to use this equation, if you're trying to use it for an electron, just ask yourself first, does an electron travel at the speed of light?

我们知道它只对光适用是因为在这个方程里有,光速，所以下次你们用这个方程前，如果你们要把它用到一个电子上，先问问你自己，电子的运动速度是光速吗？

麻省理工公开课 - 化学原理课程节选