柯林斯英汉双解大词典
perpetual motion (also perpetual-motion)
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1.
N-UNCOUNT The idea of perpetual motion is the idea of something continuing to move forever without getting energy from anything else. 永动
双语例句原声例句权威例句
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Indeed, on the atomic scale, perpetual motion is a reality.
的确，从原子尺度看，永恒的运动是一个确实存在的事实。
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Making energy like the sun does might too cheap to meter or as uneconomical as a perpetual motion machine.
像太阳一样产生能量可能会太便宜以至于无法计费，或是像永动机一样太不合算。
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That would that would give rise to a perpetual motion machine, breaking of the second law. It can't happen.
否则就会使,得永动机出现，打破第二定律那是不可能的。
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