And, the values that it takes can be broken into three groups.

它所代表的值,能被分为三部分。

麻省理工公开课 - 固态化学导论课程节选

So in talking about the hydrogen atom, they actually have different names for different series, which means in terms of different n values that we end in.

所以就氢原子来说，它的每个系都有不同的名字，代表了不同的末态n值。

麻省理工公开课 - 化学原理课程节选