So any time that you're drawing these molecular orbital diagrams you want to keep in mind that the number of electrons that you have in atomic orbitals, you need to add those together and put that many electrons into your molecule.

任何时候当你们画分子轨道图时,你们要记住,原子轨道里的电子数，你要把它们加在一起,并放到分子轨道里去。

麻省理工公开课 - 化学原理课程节选

All right, so I did this not at all purposely, but this can point out for you that you need to make sure that the number of electrons that you have in your molecular orbital does match up with the total number that you have in your atomic orbitals.

我并不是故意这么做的，但这告诉我们必须要保证,分子轨道里的电子数,和原子轨道里的,总电子数能对上。

麻省理工公开课 - 化学原理课程节选