Roller coaster and jumping machine is the car itself has a speed, and then take your body forward, the whole person is back.

过山车和跳楼机都是这个车本身有一个速度，然后带着你的身体往前冲，整个人属于后仰状态。

youdao

While I'm not sure "jumping off of buildings" is my top pick for a lucid dreaming activity - this project definitely seems worth a try. - The lucid dream machine.

我并不确定“从高楼上跳下”是我在做清醒梦的时候最先想要做的事情，不过我想一定值得一试。

youdao

Because the machine is equipped with jumping mechanism, it is unnecessary to reset the tool after returning grinding wheel for measurement or dressing.

机床设有快跳机构，因此退出砂轮进行测量或修正后不必重新手动对刀。

youdao