If you pay me ten thousand dollars a month to work for you, I'll work for you and I'll think "I'm doing it for ten thousand dollars a month, that makes a lot of sense," but if I do it for nothing then I have to ask myself, "Why am I doing it?"

如果你一个月给我一万美元帮你工作，我会为你工作，但我会想,”我是为了一万美元才做的，这样更合理“,但如果我一点报酬都没有，那我就会问我自己，”我为什么要做这份工作？”

耶鲁公开课 - 心理学导论课程节选

It makes sense to draw the wave function as a circle, because we do know that 1 s orbitals are spherically symmetric.

把波函数画成一个圆是有道理的，因为我们知道1s轨道是球对称的。

麻省理工公开课 - 化学原理课程节选