This is the radial probability distribution formula for an s orbital, which is, of course, dealing with something that's spherically symmetrical.

这个ｓ轨道的,径向概率分布公式，它对于球对称,的情形成立。

麻省理工公开课 - 化学原理课程节选

One peculiar property of this--incidentally, at every point of time this thing holds, this is time to maturity.

顺便说一下这个公式一个特别的性质,这个等式在任何时候都成立,这是贷款剩余期限

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