porous polymer beads

例句：

1. 1. The spongeis porous and can absorb a lotof water.
   海绵是多孔的，可以吸收很多水。
2. 2. The soil is porous, allowing roots to penetrate easily.
   土壤是多孔的，使根系容易穿透。
3. 3. The fabric is porous, allowingair to circulate freely.
   这种布料是多孔的，允许空气自由流通。