As its name suggests, it USES a rubber or elastic spring that can compress or expand when needed.

正如其名字所表示的那样，它使用了一个橡胶或弹性春天可以压缩或扩展需要时。

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The vehicles that press down on a bridge's roadway compress the top half of the road, causing it to shorten like a compressed spring.

那些从桥上过压紧桥面的车辆会导致路面上半部分的压缩，使其想被压缩的弹簧一样变短。

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Spring sag is the amount the springs compress between fully topped out and fully loaded with the rider on board in riding position. It is also referred to as static ride height or static sag.

弹簧下沉是从减震完全伸展开到骑手坐到车上后弹簧的压缩量，也叫作静态下沉或静态骑乘高度。

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Therefore, it'll compress by an unknown x, which is equal to mg divided by the force constant of the spring.

因此它的压缩量为 x,也就等于 mg 除以弹簧的弹性系数

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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

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