" In this galaxy, there's a mathematical probability of three million Earth-type planets" .

" 在银河系里，理论上可能有300万颗地球这样的行星" 。

While an orbital is actually a mathematical probability function that tells us where we're likely to find an electron.

轨道实际上是一个数学概率函数，它告诉我们可能在哪里找到电子。