OK PROFESSOR: Valence electrons. OK, sometimes you're going to be asked to draw a molecular orbital diagram where you're asked to include all electrons, and sometimes it will specifically say only include valence electrons.

教授：价电子，有时候你画一幅分子轨道图,有时候要求你画出所有的电子，有时候特别要求,只包括价电子。

麻省理工公开课 - 化学原理课程节选

Of course,he said he doesn't particularly care -maybe I should take him to another one.

当然,他说他没有什么特别的要求,也许我应该带他去另外一间餐厅

耶鲁公开课 - 金融市场课程节选