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  1. perpetual motion

    • IPA[pərˈpeCH(əw)əl ˈmōSHən]

    美式

    • n.
      a state in which movement or action is or appears to be continuous and unceasing;the motion of a hypothetical machine which, once activated, would run forever unless subject to an external force or to wear
    • noun: perpetual motion

    • 釋義

    名詞

    • 1. a state in which movement or action is or appears to be continuous and unceasing the planet is in perpetual motion the perpetual motion of the dance floor
    • the motion of a hypothetical machine which, once activated, would run forever unless subject to an external force or to wear the age-old quest for the secret of perpetual motion a perpetual motion machine
    • 更多解釋

    英式

    • n.
      a state in which movement or action is or appears to be continuous and unceasing: the planet is in perpetual motion the perpetual motion of the dance floor

    Oxford Dictionary