All right. If the derivative is small, it's not changing, maybe want to take a larger step, but let's not worry about that all right?

好，如果导数很小的话，函数就基本没什么变化,可能我们就想把步子迈大一点儿了,但是别为这个担心？

麻省理工公开课 - 计算机科学及编程导论课程节选

Now I am going to break this into elementary steps and look at the relative contributions.

我会把这整个变化过程化为几个基本的步骤,去考察每一步的变化量。

麻省理工公开课 - 固态化学导论课程节选