It is evident that the permeability is not a constant. 顯然磁導率不是常數。
Left-handed materials are materials that have simultaneously negative permittivity and negative permeability. 左手材料是一種介電常數和磁導率同時為負值的材料。
Rocks have better water permeability than sand. 岩石的透水性不如沙土。
The soft soil is featured by big viscosity, bad water permeability, big water content, low bearing capacity, big settlement and complex soil layers. 軟土地基的土質具有粘性大，透水性差，含水量大，承載力低，沉降量大，土層結構複雜等特點。
