基本解释[土木建筑工程]不透水系数英汉例句双语例句The compactness of concrete is an important factor that affects concrete's durability and impermeability.混凝土的密实度是混凝土耐久性及抗渗性的一个重要指标。impermeability factor更多例句专业释义土木建筑工程不透水系数