These are actually all examples that we'll talk about in freshman chemistry at some point, as an example of a connection between a chemical principle we learn, and what we can know about how it functions.

作为联系一个我们,所学的化学原理,和我们能知道它，如何工作的例子。

麻省理工公开课 - 化学原理课程节选

The second point of the Aufbau Principle is just energetics.

构造原理的第二点是,它只和能量相关。

麻省理工公开课 - 固态化学导论课程节选

And when we make these comparisons, one thing I want to point out is that we need to keep the constant principle quantum number constant, so we're talking about a certain state, so we could talk about the n equals 2 state, or the n equals 3 state.

当我们做这些比较时，我想指出的一件事是,我们需要保持常量原则,保持量子数是常数，所以我们在讨论一个确定的态时，我们可以谈论n等于2的态，或者n等于3的态。

麻省理工公开课 - 化学原理课程节选