It means, when you are accelerating upwards, as the elevator picks up speed, the reading on the spring will be more and you will feel heavy.

这意味着，当你向上加速时，当电梯加速时，弹簧上的读数会更大，你会感到沉重。

youdao

It picks up speed when swimming, and leaps out of the water.

在游泳的时候它们加快速度，以超乎寻常的速度冲出水面。

youdao

The car picks up speed with just a touch of the accelerator.

这辆车只要你一触加速器就会加速。

youdao

It means, when you are accelerating upwards, as the elevator picks up speed, the reading on the spring will be more and you will feel heavy.

也就是说当你向上做加速运动时,就像电梯加速的时候,弹簧的读数会增大,你会觉得自己变重了

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