But the reality that we know from our quantum mechanical model, is that we can't know exactly what the radius is, all we can say is what the probability is of the radius being at certain different points.

我们不可能准确的知道,半径是多少，我们只能说，它在不同半径处，的概率是多少，这是,量子力学。

麻省理工公开课 - 化学原理课程节选

This is Pieter Claesz, C-L-A-E-S-Z, probably mispronounced.

这是彼得·格莱兹的作品,C-L-A-E-S-Z,我可能发音不准确

耶鲁公开课 - 欧洲文明课程节选