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perpetual motion英英字典_perpetual motion剑桥英语解释_perpetual motion柯林斯英文解释_2020年的事情英文词典
2020年的事情英文词典

perpetual motion

P 开头单词

柯林斯词典

    perpetual motion (also perpetual-motion)

  • 1. N-UNCOUNT The idea of perpetual motion is the idea of something continuing to move forever without getting energy from anything else. 永動

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