They may be not on the national radar For me, in my own life, when I think of real heroes or even role models, or well-known people in the Patheon of struggle.

有哪些是你觉得人们需要了解的？,对于我来说，当我想到真正的英雄或者榜样时，或者先贤祠中的名人。

普林斯顿公开课 - 人性课程节选

Now, I hope you guys know that much calculus, that when you take a derivative of a function of a function, namely v square over 2 is a function of v, and v itself is a function of t, then the rule for taking the derivative is first take the v derivative of this object, then take the d by dt of t, which is this one.

我希望你们了解更多的微积分知识,当你对复合函数求导时,也就是说v^/2是关于v的函数,而v本身是关于t的函数,求导的法则应该是,第一步是这一部分对v求导,然后v再对t求导,得到这一部分

耶鲁公开课 - 基础物理课程节选