So, it's Newtonian mechanics, and the reason for this is because Newtonian mechanics does not work on this very, very small size scale.

牛顿力学，因为牛顿力学,在这种很小的尺度下不适用,我们说过，牛顿力学。

麻省理工公开课 - 化学原理课程节选

I can't explain this because classical physics doesn't work at atomic dimensions.

我不能解释这个,因为经典物理在不适用,就原子尺度而言。

麻省理工公开课 - 固态化学导论课程节选