to rise and to say anything was a violation of the culture, and that's one of the places where you see where this sharp line exists. They just take orders, but the gentlemen don't just take orders.

起身反抗和发表见解是有违当时的文化的,从这一点可以看出当时社会,森严的等级界限,普通人只能服从指挥,但是有地位的人不仅接受命令

耶鲁公开课 - 古希腊历史简介课程节选

So these names, they don't really make any sense why they're called past s p and f, and it turns out that it comes from spectroscopy terms that are pre-quantum mechanics where, for example, this is called the sharp line, I think the principle, the diffuse, and the fundamental.

看到这些名字，你会发现,它们为什么叫s，p，f是没什么道理的，事实上,它们来源于,量子力学之前的光谱学中的术语，例如，它们分别叫做锐线，我认为是主线，漫射和基本。

麻省理工公开课 - 化学原理课程节选