We've talked about getting lucky, finding a naturally occurring attenuated live vaccine as in the case of smallpox.

我们谈到过,在天花病案中,我们发现自然弱化的活性疫苗,是多么的幸运

耶鲁公开课 - 生物医学工程探索课程节选

Anywhere where that's the case we're going to have no probability density of finding an electron.

这时面内任何地方,找到电子的概率密度都是零。

麻省理工公开课 - 化学原理课程节选

So, if we say that in this entire plane we have zero probability of finding a p electron anywhere in the plane, the plane goes directly through the nucleus in every case but a p orbital, so what we can also say is that there is zero probability of finding a p electron at the nucleus.

而只要是ｐ轨道,这个平面都直接，穿过原子核，那么我们,可以说在原子核上,找到一个ｐ电子的概率为零。

麻省理工公开课 - 化学原理课程节选