If you connect the body to a spring, which is neither compressed nor extended, there's no force acting on it.

如果将一个弹簧连在这个物体上,弹簧既没有被压缩也没有被拉伸,也不会有力作用在它上面

耶鲁公开课 - 基础物理课程节选

She'd love to tell Comus something about chastity, but he has neither ear nor soul to apprehend the sublime notion and high mystery.

她愿意告诉科玛斯关于贞节的事，但是科玛斯既没有耳朵也没有灵魂,去理解高尚的理念和谜团。

耶鲁公开课 - 弥尔顿课程节选

It also tells you that if you compress the spring, compress it means x is now-- x is measured from this position, where the spring is neither compressed nor expanded.

它还能告诉你,如果压缩弹簧,压缩就意味着现在 x...,x 是从这个位置开始算的,在这个位置弹簧既没有压缩也没有伸长

耶鲁公开课 - 基础物理课程节选