- The fact that I've called it X, is really just a programming -- it's a feature of the programming language that I, the human, can now refer to it.

事实是我叫它为X，它实际上只是一个程序-,它是程序的一个特写，我们可以参考使用它。

哈佛公开课 - 计算机科学课程节选