Not on the basis of simple filling in ascending order, but a modified rate of filling as according to the Aufbau Principle.

并不是以简单的升值分布为基础，而是一个修改的填充方法,根据构造原理得到的填充法。

麻省理工公开课 - 固态化学导论课程节选

And, the bottom line in modeling is make it only as complex as you need to.

模型构造的底线是,根据你的需要尽量把它弄得复杂。

麻省理工公开课 - 固态化学导论课程节选