Behaviors last longer if they're reinforced intermittently " and this is known as "the partial reinforcement effect."

间隔强化会使行为持续时间更久,这就是所谓的“部分强化效应“

耶鲁公开课 - 心理学导论课程节选

It is nowhere on this interval.

它不在这段间隔时间。

麻省理工公开课 - 固态化学导论课程节选

infinitesimal interval of time not yet 0.

不为零的无穷小时间间隔

耶鲁公开课 - 基础物理课程节选

That is the whole triumph of calculus is to know that by looking at the position now, the position slightly later and taking the ratio and bringing later as close as possible to right now, we define a quantity that we can say is the velocity at this instant.

这就得靠微积分了,通过了解它现在的位置,和一小段时间以后的位置,计算它们的比,再让时间间隔尽可能缩短,我们就定义了一个,被我们称之为瞬时速度的物理量

耶鲁公开课 - 基础物理课程节选