Because you won't want to do everything from scratch yourself, you want to be able to look at what is being created by somebody else and understand what is inside of there, whether it works correctly and how you can build on it This is one of the few places where plagiarism is an OK thing.

因为你们不会想无论做什么事情,都由你们自己亲自上阵，你们希望有能力读懂,别人创造的语言,并了解其中的内涵，运转的正确性和如何在其基础之上继续发展,这是为数不多的,合理的作弊行为之一。

麻省理工公开课 - 计算机科学及编程导论课程节选

So always amazing to us how we go into the problem, our eye or mind can see one class of solutions, but the math will tell you sometimes there are new solutions and you've got to respect it and understand and interpret the unwanted solutions, and this is a simple example where you can follow what the meaning of the second solution is.

解决问题的方式总能让人惊喜不已,我们的眼睛或思想可以看见一类解,但数学有时会告诉你还有新的解,你不能忽视它,而是解释这些不期而至的解,这只是一个简单的例子,由此你可以理解第二个解的意义

耶鲁公开课 - 基础物理课程节选