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

Recognizing that the market does not top out into a correction on the same day in the spring every year, nor does it launch into a rally on the same day in the fall each year, in 1999 I introduced a similar strategy that has been one of the portfolios in my newsletter since.

FORBES: Sell In May, Great, But Go Away For How Long?

Little did Papa realize that morning that he was never to see us or hold us again, nor would he ever again harken to the meadowlarks of Yell County trilling a joyous anthem to spring.

NPR: Excerpt: 'True Grit'

The car's styling forgave a multitude of other sins, including a penny-pinched interior, mediocre fuel economy and a rather heavy, trembling, fundamentally unathletic chassis that no amount of spring rates nor summer tires could mediate.

WSJ: Chrysler 300C Luxury Series Review: A Global Melange Yields Brash Elegance | Rumble Seat by Dan Neil