impervious concrete [土木建筑工程]防滲混凝土impervious blanket [水利] 不透水面層；防滲鋪蓋impervious bed [礦業(yè)] 不透水層；非滲透層impervious (adj.) impervious adj. 不受影響的，無動于衷的；不能滲透的imperviable adj. 不能滲透的；不接受的（等于impervious）imperturbed (adj.) imperturbed adj.鎮(zhèn)靜的；神色自若的imperturbation n.沉著；冷靜；泰然自若imperturbably adv.泰然地；平靜地；冷靜地imperturbableness adj.沉著的；泰然自若的；鎮(zhèn)靜的imperturbable (adj.) imperturbable adj.沉著的；泰然自若的；鎮(zhèn)靜的imperturbability n.沉著；冷靜impertinently (adv.) impertinently adv.不切題地；不恰當(dāng)?shù)?；不禮貌地impertinent (adj.) impertinent adj.魯莽的；無禮的；粗魯?shù)?；離題的impertinency n.無禮(不切題)impertinencies n.無禮(不切題)