So Steve and Patrick are respectively the managers of Coca-Cola and Poland Spring and Patrick believes that the Coca-Cola manager is going to may be we should just make this Coke and Pepsi since two identical they're near enough and identical, right?

史蒂夫和帕特里克分别是,可口可乐和波兰泉的经理,帕特里克认为可口可乐的经理打算,或许该用可口可乐和百事可乐,他们俩才是对手是吧

耶鲁公开课 - 博弈论课程节选

That means, when I take two derivatives, I want to get a, then you should know enough calculus to know it has to be something like at^, and half comes from taking two derivatives.

也就是说,当我想求二阶导时,得到了a,你应该有足够的微积分知识,才能知道必须有类似at^的项,而这个1/2则是因为求了两次导数

耶鲁公开课 - 基础物理课程节选