Interchangeable PARTS: use an interchangeable part for the internal region of the spring side.

互换部分：在弹簧内部区域使用互换零件。

youdao

youdao

Our genes also help determine whether we look on the bright side, helping explain why some people have a spring in their step.

我们的基因也帮助决定我们是否看到光明的一面，帮助解释为什么有些人步履轻快。

youdao

You cannot have a spring pulled only at one side, because then it will then accelerate with infinite acceleration in that direction.

你不可能对弹簧只施加一边的拉力,因为那样的话弹簧就会以无穷大的加速度加速,就在这个方向上

耶鲁公开课 - 基础物理课程节选

This spring is getting squashed on either side, and it'll squash by certain amount x, that depends on your mass, and that x will be turned into a motion of a needle and that'll read your mass.

这个弹簧两边都会受到压缩,压缩量为 x,它由你的质量决定,x 会转换成指针的运动,你从而可以读数

耶鲁公开课 - 基础物理课程节选

The Potters arrive on Teesside without a win in seven matches and Turner believes his side can spring an upset against the Premier League club.

BBC: Hartlepool boss senses Cup upset

But there is a tastier side to Salt Spring creativity, with a growing menu of artisan food and drink producers on the island.

BBC: Canada��s creative island escape

He has a history of injuries in that part of his body: Wright suffered from a stress fracture in his back during the 2011 season and missed time last spring, also with a side injury.

WSJ: Wright's Injury Puts Mets In 'World' of Pain