Then, you may have forces to the right, forces to the left pushing, pulling.

然后你就有向右的力,和向左的力,推力和拉力都有

耶鲁公开课 - 基础物理课程节选

That is correct, but you don't want to give it a definite push.

这没错,但你没有给出一个确定的推力

耶鲁公开课 - 基础物理课程节选

I appreciate the opportunity to speak with you and also to have been a part of this beloved community for these many years. It's been a privilege and an opportunity for me to think more about what the next chapter of my life will bring.

感谢能有这个机会和你交谈,也感谢能成为这个可爱的群体中的一部分,这么多年了，在这儿有种推力,也给了我一个机会，让我更多地思考,我人生的下一章会带来什么。

普林斯顿公开课 - 人性课程节选

This equation is telling you if you compress it, namely if x is negative, F will be then positive, because it's pushing you outwards.

这个方程告诉我们,如果压缩弹簧,即令 x 为负,F 就为正,因为推力的方向向外

耶鲁公开课 - 基础物理课程节选