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  1. Oxford Dictionary

    water measurer

    • n.
      a long, thin aquatic bug which walks slowly on the surface film of water and spears small prey with its beak.

    • noun: water measurer, plural noun: water measurers

    • 更多解釋

    water measurer

    • n.
      a long, thin aquatic bug which walks slowly on the surface film of water and spears small prey ...

    Oxford American Dictionary