For example, F x y z if I have an equation that looks like this, f of x, y, z.

打个比方，我有个这样的方程。

麻省理工公开课 - 固态化学导论课程节选

XYZ I might as well do it as x, y, z because we are talking about something that is going in three space.

我最好设成,因为我们在讨论,三维的事物。

麻省理工公开课 - 固态化学导论课程节选

X Y Z It's more interestingly named an X or Y or Z.

你也可以把它命名为。

哈佛公开课 - 计算机科学课程节选

That's it. Again, these other p dxy dyz - or the d x y, d y z, those are going to be those more complicated linear combinations, you don't need to worry about them.

同样，这些p轨道,或者，它们是一些,很复杂的线性组合，你们，不用管它。

麻省理工公开课 - 化学原理课程节选

This now has, gee, a funny thing, x it says IF x is less than y AND x is less than z, then do something.

代码现在有，啊，一个有趣的东西，代码先是判断x是不是小于y并且,是不是小于z，然后做一些事情。

麻省理工公开课 - 计算机科学及编程导论课程节选

x y z And I have another equation f of x, y, z.

若我有另一个方程。

麻省理工公开课 - 固态化学导论课程节选

And just as with variables, you should use some common sense, some style here, and the function's name should X Y communicate what it does, calling it X or Y or Z is generally not all that helpful.

就像变量，你使用一些常识，一些类型，和函数名需要,传达它所做的事情，把它叫做,或者Z通常是没有什么用处的。

哈佛公开课 - 计算机科学课程节选

So, we can have the 2 p x, 2 p y, and 2 p z orbitals.

所以我们有2个px2个py2个pz轨道。

麻省理工公开课 - 化学原理课程节选

Z So it would be incorrect to try to assign this to a variable X or Y or Z, because it doesn't actually give me anything back.

这个是错误的，来赋值这个给变量X或Y或,因为它的确没有返回什么给我。

哈佛公开课 - 计算机科学课程节选

It adds x to y and stores it into z. But if someone wants to be a even a little more snarky, what does this program do?

它把x加上y，再把结果存到z中，但是如果有人,想要做的有点不合常理点呢，那这个程序会做什么？

哈佛公开课 - 计算机科学课程节选

Now, unlike high school math or in algebra Z where you call things X and Y and Z, in programming, in computer science, you're actually dealing with humans where it's useful to have a variable name that's more descriptive than X and Y and Z.

不像高中数学或者代数中,称为X和Y和，在程序设计和计算机科学里，你实际上是在和人打交道,在这里有个描述性比xyz更强的,变量名称是很重要的。

哈佛公开课 - 计算机科学课程节选

All right, so one thing that I want to point out, which I said many, many times on Friday, and this is perhaps the last time I'll say it, but one last time is we can think about why we only see a line for the 2 p orbital, versus we don't see separate lines for a 2 p x, a 2 p y, and a 2 p z.

好的，我还要指出一个问题，这个问题我在上周五已经说了很多很多次了，这可能是我最后一次提到它，但是这最后一次让我们来考虑一下,为什么我们只看到了一条，对应于，2，p，轨道的线,而不是分别对应于，2，p，x，2，p，y，2，p，z，的线？

麻省理工公开课 - 化学原理课程节选