So, what we know is happening is that were having transitions from some excited states to a more relaxed lower, more stable state in the hydrogen atom.

我们知道，这里所发生的是,氢原子从激发态到更低更稳定的态的跃迁，而我们用眼睛可以探测到的。

麻省理工公开课 - 化学原理课程节选

Down in Southern California, it's a lot more relaxed, more of a beach scene

在南加州，生活比较悠闲，有很多海景海滩，

与圣地亚哥不一样 - SpeakingMax英语口语达人