We can think of it in the same type of way when we're talking about actual reactions happening.

我们在讨论一个真实反应的时候,也可以从这个观点出发来进行分析。

麻省理工公开课 - 化学原理课程节选

So I just want to use that again and again, starting from that, for various different sorts of conditions andderive the criterion for equilibrium in each set of conditions.

所以我将会一遍又一遍地使用这个公式，从这个公式出发，在各种条件了,推导出,任意条件下的平衡条件。

麻省理工公开课 - 热力学与动力学课程节选

So it looks like not too many more than half of you got this correct, so make sure you can look at your periodic table and figure out how to think about ionization energy in terms of z effective, not just in terms of memorizing what that trend is.

看起来只有一半多一点的人,做对了，所以请大家务必做到能够通过观察周期表,并在考虑电离能时,从有效核电量的观点出发，而不是仅仅依靠记住这个规律。

麻省理工公开课 - 化学原理课程节选

It starts from the origin and goes to this point.

它从原点出发到达这个点

耶鲁公开课 - 基础物理课程节选

So first, let's start with the one that we already know, and make sure that it still works, starting from here, mainly our isolated system.

首先，我们从我们已知的一个例子入手，看看这个判据是否正确，从绝热系统出发。

麻省理工公开课 - 热力学与动力学课程节选