It means that the properties of the system, the properties that describe the system, don't change in time or in space.
它的意思是指,用以描述系统的性质,不随时间或空间改变。
So, these on-changing properties that describe the state of the equilibrium state of the system are called state variables.
这些描述,系统平衡态的,变化的属性,就叫做状态变量。
It varies in its structure among cells of the nervous system but all synapses have some properties in common.
突触结构因神经系统细胞不同而不同,但突触都有某些共同属性
You have extensive properties and intensive properties The extensive properties are the ones that scale with the size of the system.
广延量,和强度量,广延量的值,随着系统的规模变化。
So the temperature is intensive, and you can make intensive properties out of the extensive properties by dividing by the numberof moles in the system.
所以温度是强度量,你可以通过,除以系统中物质的摩尔数,来从广延量中导出强度量。
OK, any questions? All right, so we've described the system with these properties.
好,有没有问题?,好的,我们已经用这些性质描述了系统,这些性质。
We're going to find other properties that do care about the history of the system like work, that you put in the system, or heat that you put in the system, or some other variables But you can't use those to define the equilibrium state.
我们还会发现其他一些,与系统的历史有关的性质,比如你对系统做的功,或者你向系统传递的热量,或其他的变量,但你不能用它们,来定义平衡态。
It turns out that when you're talking about macroscopic properties of matter, you don't need very many variables to describe the system completely thermodynamically.
实际上,当你谈及物质的宏观性质时,你并不需要很多变量才能从热力学上,完整地描述这个系统,’
And so the set of properties that describes system equilibrium doesn't change.
这些描述系统的属性,平衡是不变的。
Intensive properties don't care about the scale of your system.
强度量与系统的规模,没有关系。
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