After meeting with Arab foreign ministers in Morocco, Clinton sought to deflect that criticism, saying none of her counterparts characterized what she said in Jerusalem as representing a change in U.S.position.

VOA: standard.2009.11.02

But luckily for us, there's a classical equation of motion that will, in fact, describe how the electron and nucleus change position or change their radius as a function of time.

但幸运的是，有一个,经典方程描述了电子和核子,位置或者它们直接的距离是,如何随时间变化的。

麻省理工公开课 - 化学原理课程节选