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

It remains diverse today, and not in a way that is likely to facilitate popular rule once the forcing function of an American military presence is done.

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Another potential rub in welcoming world finance is the rule-of-law problem: Capital markets function on trust, and welshing on derivatives contracts, for example, is not conducive to bringing big money to the mainland.

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Confirming a widely-held rule of thumb, German researchers found that the deterioration in motor function of athletes after long trips lingered for roughly as many days as the number of time zones they crossed.

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