And when the forward and reverse reactions occur at the same rate, that's called chemical equilibrium.

当正向和反向反应以相同的速率发生时， 这就是所谓的化学平衡。

Chemical equilibria can be disturbed by changes in the concentration of one or more substances or by changes in temperature or pressure.

一种或多种物质的浓度变化或温度或压力的变化会扰乱化学平衡。

You also learned and saw that chemical equilibrium can be affected by the concentration of substances their temperatures, and if they're gasses, their pressure.

您还了解到并看到化学平衡会受到物质浓度及其温度的影响，如果它们是气体，则受其压力的影响。

Math, of course, is the way to answer questions like these, so today I'm going to show you some simple, totally non-scary calculations that will help you get a handle on chemical equilibrium.

当然，数学是回答此类问题的方法，所以今天我将向您展示一些简单的、完全不可怕的计算，它们将帮助您掌握化学平衡。

But of course you're not totally at chemistry's mercy; you can tinker with chemical equilibrium by altering the concentration of the substances and their temperature and if they're gases, the pressure on them.

但是当然，您并不完全受化学的摆布；你可以通过改变物质的浓度和它们的温度来修补化学平衡， 如果它们是气体， 还可以改变它们的压力。

In fact, most chemists make their living using tricks to prevent chemical equilibrium, to knock it out of whack, maximizing the concentrations of the chemicals they want to produce at the expense of the balance that nature usually seeks.

事实上， 大多数化学家谋生时都使用一些技巧来阻止化学平衡，将其打乱，以牺牲自然界通常寻求的平衡为代价来最大化他们想要生产的化学物质的浓度。