So if we're talking about the fourth excited state, and we talk instead about principle quantum numbers, what principle quantum number corresponds to the fourth excited state of a hydrogen atom.

如果我们说的是,第四激发态，我们用,主量子数来描述，哪个主量子数对应了,氢原子的第四激发态？

麻省理工公开课 - 化学原理课程节选

She was walking her dog. We were so excited.

她那时在遛狗。我们太兴奋了。

在超市购买的画 - SpeakingMax英语口语达人

So another way to say that is, in a sense, if we're thinking about the excited state of a hydrogen atom, the first excited state, or the n equals 2 state, what we're saying is that it's actually bigger than the ground state, or the 1 s state of a hydrogen atom.

换句话说，如果我们激发一个氢原子，第一激发态或者说ｎ等于２的态，我们说它比氢原子基态,或者说１ｓ态要大。

麻省理工公开课 - 化学原理课程节选

But yeah we're all excited to have you here and we have all sorts of things planned outside of problem sets and we have the Fair and everything that David has been talking about so we're really excited to start so.

我很高兴大家能来到这儿,除了习题集外我们还会遇到各种各样的问题,还有刚才David说过的,研讨会和其他东西,这门课开始了，我们真的觉得很高兴。

哈佛公开课 - 计算机科学课程节选

So the key word here is that we asked you to identify the third excited state. So, what white is n equal 4 Ok to for the third excited state? 4 OK.

这里的关键的地方是我,要你们找到第三激发态,第三激发态的n等于多少？

麻省理工公开课 - 化学原理课程节选

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

So, for example, we could talk about the n equals 2 state, so that's this state here, and it's also what we could call the first excited state. So we have the ground state, and if we excite an electron into the next closest state, we're at the first excited state, or the n equals 2 state.

例如，我们可以考虑n等于2的状态，它在这里，它也被称作是第一激发态,我们有基态，如果我们把一个电子,激发到它最近邻的态,那就是第一激发态，或者n等于2的态。

麻省理工公开课 - 化学原理课程节选