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

Here's one climbing out of the pool: First her face appeared, long and cadaverous, with a bandage-like bathing cap coming down almost to her eyes, and sharp teeth protruding from her mouth.

有一个女人从游泳池中出来了，首先是她的脸，修长,而惨白，如绷带般的泳帽从她的头部,耷拉到她的眼睛，锋利的牙齿从她的口中突出。

耶鲁公开课 - 1945年后的美国小说课程节选