基本解释[土木建築工程]不透水系數英汉例句雙語例句The compactness of concrete is an important factor that affects concrete's durability and impermeability.混凝土的密實度是混凝土耐久性及抗滲性的一個重要指標。impermeability factor更多例句专业释义土木建築工程不透水系數