Because I could've built that in, it says if you change the value of this thing, by the way you need to change recompute those other values in order to make this hold up.

我想要大家通过定义好的方法，来改变实例的值了,因为我可以把这个功能，内置到方法里面去,它的意思就是如果,你改变一个值。

麻省理工公开课 - 计算机科学及编程导论课程节选

And yeah, I know it comes built in, that's OK, what we want to do is use it as an example to look at it.

对，我知道这个方法可以通过内置的算法，来实现，这没关系，我们只是,把它当做一个例子来讲解。

麻省理工公开课 - 计算机科学及编程导论课程节选

So you see why I say it's a template, right?

然后通过这两个赋值声明,在cp2中内置了x值和y值？

麻省理工公开课 - 计算机科学及编程导论课程节选