porous

• 形容材料或物质具有微小的孔洞，液体或空气可以缓慢通过。也指多孔的、能渗透的、透气性的。

Describes a material or substance that has tiny holes allowing liquid or air to pass through slowly.

1. Able to absorb fluidsB2formal

   Describes a material that can take in liquids or gases through small openings.

   多孔的

   • The sponge is highly porous and soaks up water quickly.
   • Porous rocks like sandstone can hold groundwater.
   • This type of clay is porous, making it ideal for pottery that breathes.

   同义词absorbentpenetrablepermeableperviousspongy

   反义词denseimpermeablenonporoussolidwaterproof

2. Full of pores or small holesB2formal

   Having many tiny openings or vessels that allow the passage of air or liquid.

   多孔的

   • The porous surface of the brick helps it dry quickly.
   • Bone tissue is naturally porous, which makes it lightweight.
   • The membrane is porous, allowing certain molecules to pass through.

   同义词absorptivehoneycombedpenetrablepermeableperviousspongy

   反义词denseimpermeablenonporoussolid

3. Allowing passage in and outC1formal

   Permitting the movement of substances, ideas, or influences through a barrier.

   可渗透的

   • The country's porous borders make it difficult to control immigration.
   • The security system is porous, with many vulnerabilities.
   • A porous filter allows water to flow through while trapping sediment.

   同义词absorbentopenpenetrablepermeablepervious

   反义词impermeableimperviousnonporous