该模型的连续性证明的表达式“周期性波动”和“商业周期”，虽然动作既不恒定的持续时间也不恒定的长度。

The continuous character of this model justifies the expressions' cyclical fluctuations' and 'business cycle' although the movements have neither constant duration nor constant length.

youdao

他再也不用每几个小时就吃一次饭；过量的生长激素产生了大量的胰岛素，当血流量不恒定时，就造成患者血糖升高。

He no longer had to eat every couple of hours; the excess growth hormone caused an overproduction of insulin, which sent his blood sugar plunging when he wasn't maintaining a constant stream of food.

youdao

所有这些各种各样的损耗，尽管它们数量很大，却一点也不违反能量守恒定律。

All these various losses great as they are do not in any way contradict the law of conservation of energy.

youdao

I mean maybe up the street we whisper, but here we know it. And, so here is a different kind of system where we have a constant external pressure.

或许在街上你们低声细语，但在这里不应该这样，这是另一个系统,我们有一个恒定的外压强。

麻省理工公开课 - 热力学与动力学课程节选

First, free velocity, constant velocity can be obtained for free without doing anything.

首先,速度是无偿的,恒定速度不需外力作用就能无偿获得

耶鲁公开课 - 基础物理课程节选

Is never going to be the most convenient one experimental.

试验中要保持熵恒定,是非常不方便的。

麻省理工公开课 - 热力学与动力学课程节选