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。
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。
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