porous formation

• 多孔岩层

porous formation的用法和样例：

例句

1. Permeability is the ability of the formation to conduct fluids.
   渗透率是岩层传导流体的能力。
2. Oil is usually found in porous rock under a layer of impermeable rock which prevents it from escaping.
   石油通常存在于多孔性的岩石中，上面覆盖着不可渗透的岩层，使石油不致散失。