这是一架钢琴，能够方便的在床上或者地板动作的婴儿成长。

And this is one piano that fits easily in the crib or moves to the floor as baby grows!

youdao

例如，无论一个舞者多么想要跳离地板，然后开始旋转，角动量守恒定律绝对阻止这样的动作。

For example, no matter how much a dancer wishes to leap off the floor and then start turning, the law of conservation of angular momentum absolutely prevents such a movement.

youdao

架设在地板的虚拟实境投影机会将影像往上传，结果就呈现出动作流畅、逼真的清晰全息摄影影像。

Virtual reality projectors in the floor will send images upward. The result will be clear, holographic images with smooth, realistic movements.

youdao