I'm sure you remember some of the simpler rules for differentiation and could quickly tell me that the derivative of x2 is 2x.

我确信你们仍然记得一些简单的规则，并且能够迅速地告诉我x2的导数是2x。

youdao

The magma is originated from the mantle and maybe the "derivative magma" rich in volatile and sodium, formed by the differentiation of basalt magma.

熔浆来源于慢源，可能是玄武岩浆分异的、富挥发分富钠质的“派生岩浆”。

youdao

In other words, your job is to guess a function whose second derivative is a, and this is called integration, which is the opposite of differentiation, and integration is just guessing.

换言之,你的任务是要猜出一个二阶导数为a的函数,这就是积分,和微分恰恰相反,积分就是猜

耶鲁公开课 - 基础物理课程节选