As the scientists explain, moving objects with light can be done using the photophoresis effect in air and other gases.
这些科学家解释说,利用空气和其他气体中的光脉现象可以实现用光移动物体。
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This can be turned into work by letting it fall down the staircase once again—an analogy of using the movement of hot and cold gases to do work in Maxwell’s original thought experiment.