The result, under favorable conditions, is a dynamic equilibrium in which neither fluid volume nor sodium concentration fluctuates too dramatically.

这样在有利的环境下，液体与其中盐浓度之间形成的动态平衡，两者均不致出现大起大落。

youdao

Writing at equilibrium that the change in the concentration of one of the species is equal to zero, we're going to use that as an approximation also later, when we get to more complicated mechanisms.

这写着在平衡状态一种物质，的浓度变化等于零，我们一会儿也会把它用作一种近似，当我们学习更复杂的机理的时候。

youdao

So if you were to sketch it out as a function of time, eventually you'll get to the concentration a equilibrium.

那么如果你把它作为时间的函数画出来，最终你会达到浓度A平衡。

youdao

It doesn't tell you, this is the equilibrium concentration that you'll end up with.

他无法告诉你,最终平衡时的浓度是多少。

麻省理工公开课 - 热力学与动力学课程节选