He dropped a tension spring he was working with and watched it slink away across the floor.

他工作时，一个张力弹簧掉在了地上，他就看着弹簧在地板上滑动。

youdao

Gerard bent cautiously to the rat’s box—would it spring out, bite him, then scurry away across the floor to live behind the baseboard forever, like some cartoon incarnation?

杰拉德弯下腰，小心翼翼地接近装老鼠的箱子——一旦老鼠窜出来咬他时，就象一些动画片里的人物一样，可以跨过地板，永远躲藏在护墙板上面吗？

youdao

My family thinks I'm such a hippie weirdo for sleeping on a futon on the floor, and I'll bet it crossed their mind at least ONCE that they think I am too cheap to spring for a bed.

我的家人认为我是个嬉皮怪胎，因为我睡在地板上的蒲团之上。我确信，他们不止一次地认为我太穷了，买不起床。

youdao

The spring is getting squashed because you are pushing down and the floor is pushing up.

弹簧现在被压缩了,因为你在往下压,地面在往上推

耶鲁公开课 - 基础物理课程节选

You feel heavy and it reads more because the poor spring not only has to support you from falling through the floor, but also accelerate you counter to what gravity wants to do.

你感到自己变重以及读数增加,因为现在弹簧不仅要支撑你,不让你掉下来,还要抵消重力的作用让你加速

耶鲁公开课 - 基础物理课程节选

You are pushing down with the weight mg, and the floor has got to be pushing up with the mg, because the spring is not going anywhere.

你向下的作用力是重力 mg,然后地面向上的支持力也是 mg,因为弹簧现在根本没动

耶鲁公开课 - 基础物理课程节选

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