流体(液体,气体及混合物)在多孔介质中的流动叫渗流。 The flow of fluid (liquid, gas and their mixture)in porous medium is called seepage flow. 含有孔隙的固体或固体集合叫做多孔介质。 Solid body containing pores or solid collection is called porous media 孔隙,洞,裂缝 pores, cavern, fractures