So, if we want to think about what the first ionization energy is of boron, what you want to do is write out the electron configuration, because then you can think about where it is that the electron's coming out of.

如果我们要考虑,硼的第一电离能，你首先要做的是写出它的电子排布，因为在这之后,你才能知道拿走的是哪里的电子。

麻省理工公开课 - 化学原理课程节选

The first thing we need to do is write the electron configuration for the atom itself, and then we need to take an electron away.

首先我们要做的是,写出原子的电子排布，然后，我们再拿走一个电子。

麻省理工公开课 - 化学原理课程节选

The first thing we are going to do is describe the energy of the system.

首先我们要做的,是描述这个系统的能量。

麻省理工公开课 - 固态化学导论课程节选