porous beds

• 多孔介质

porous beds的用法和样例：

例句

1. The randomness is attributed to the porous medium.
   随机性起因于多孔介质。
2. This paper studied two-dimensional steady laminar flow over a porous medium stretching surface with suction or injection.
   摘要研究了具有抽吸喷注的多孔介质延伸表面上二维稳态层流的流动问题。