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。

麻省理工公开课 - 热力学与动力学课程节选

So what they do is, they're describing how these thermodynamic properties change, in terms of only state functions and state variables.

他们的作用是描述,随着状态函数和状态变量的变化，系统的热力性质如何变化。

麻省理工公开课 - 热力学与动力学课程节选

Some of the poems in this book dramatize, and describe the stylistic changes I'm talking about.

这本书里的一些诗歌生动表现，描述了我所讲的这种风格变化。

耶鲁公开课 - 现代诗歌课程节选

So, we can use Coulomb's force law to think and it does that, it tells us the force is a function of that distance. But what it does not tell us, which if we're trying to describe an atom we really want to know, is what happens to the distance as time passes?

来考虑这两个粒子之间的,它告诉我们力随距离的函数关系,但它不能告诉我们，而我们如果要描述,原子又非常想知道的是,距离随时间的变化时怎样的？

麻省理工公开课 - 化学原理课程节选

OK, now we actually would like to simplify this or to write this in terms of not the volume change, v2/v1 but the pressure change. So, we have V2 over V1.

接下来我们将要把问题简化,不用体积变化来描述，而改作用压强变化来描述，现在我们有。

麻省理工公开课 - 热力学与动力学课程节选