螺旋推进器快速旋转，生成必要的上升力，使平台升起。

The spinning of the propellers generates the necessary lift, or upward force, to raise the platform.

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在没有上升力的时候燃料块会自动熄灭，绝对安全。

In the absence of force when the fuel block can be automatically extinguished, absolute safety.

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发现这个长条物体向上移动并移向旁边，这标志着光的上升力。

And found that the rod moved upward and to the side—a sign of optical lift.

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