1 . impermeable
1. impermeable rockimpermeable 不透水impervious rock
2 . impervious to water
rubber boots are impervious to water .橡皮靴是不透水的。
3 . imperviousness
1. 不透水系數imperviousness 不通透性; 不透水; 不透水性; 密封性impetiginization 膿皰化
4 . of impervious
the most effective method to minimize stormwater runoff volume is to reduce the amount of impervious area .減少不透水的建筑面積是減少地表雨水徑流的最佳途徑。