po·rous /ˈporəs, ˈpɔr-/
  (a.)多孔的,有氣孔的,多孔性的,能滲透的
  po·rous /ˈporəs, ˈpɔr-/ 形容詞
  多孔的,疏鬆的
  Por·ous a.  Full of pores; having interstices in the skin or in the substance of the body; having spiracles or passages for fluids; permeable by liquids; as, a porous skin; porous wood. “The veins of porous earth.”
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  porous
       adj 1: able to absorb fluids; "the partly porous walls of our
              digestive system"; "compacting the soil to make it
              less porous"
       2: full of pores or vessels or holes [syn: poriferous] [ant:
          nonporous]
       3: allowing passage in and out; "our unfenced and largely
          unpoliced border inevitably has been very porous" [syn: holey]