% Some people, the next most popular answer with 5%, which is a nice low number, wanted to put two in the 2 p x before they moved on.

下一个更多的选择占了,是一个比较低的数字，想要将两个电子在移动之前放入2px轨道,记住在我们双倍填充之前。

麻省理工公开课 - 化学原理课程节选