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  1. Oxford American Dictionary

    porous

    • IPA[ˈpôrəs]

    美式

    • adj.
      (of a rock or other material) having minute spaces or holes through which liquid or air may pass；not retentive or secure
    • 釋義

    形容詞

    • 1. (of a rock or other material) having minute spaces or holes through which liquid or air may pass layers of porous limestones some rocks are more porous than others
    • ▪ not retentive or secure he ran through a porous defense to score easily