If I wanted to use print as a variable name, how do I get the system to decide gee, do I want print as a value for something, or do I want print as a command?

如果我把print当做一个变量名，我如何让系统来决定，我是要把print当做一个命令来用呢，还是要把它当做一个变量名来用呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

We want to do that because we have too many variables here. We've already got dV p we'll get rid of p as an additional variable and replace it with V which is already in here.

我们之所以要那么做,是因为这儿有太多变量了,我们已经有了dV，我们要把,作为额外的变量消去，用已存在的V代换它。

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