What is this orbital? Yup. And there's only 2pz one correct answer here, which is to 2 p z.

它的轨道是什么？，嗯，这里,只有一个答案，那就是。

麻省理工公开课 - 化学原理课程节选

Everyone knows from calculus that if you're trying to find a function about which you know only the derivative, you can always add a constant to one person's answer without changing anything.

学过微积分的人都知道,如果你想根据已知的导数,求出其原函数,你总是可以给某人的答案,随便加一个常数,且不影响结果

耶鲁公开课 - 基础物理课程节选