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  1. ripple marks

    • plural
      a system of parallel wavy ridges and furrows left on sand, mud, or rock by the action of water or wind.
    • noun: ripple mark, plural noun: ripple marks

    • 更多解釋
    • IPA[ˈripəl märks]
    • plural
      a system of subparallel wavy ridges and furrows left on sand or mud by the action of water or ...

    Oxford American Dictionary