輸入需要查詢的詞語：
詞條：銅牆鐵壁
tongqiang-tiěbi
[bastion of iron,impregnable fortress as a wall of bronze;impregnable like walls of brass and iron] 亦作「鐵壁銅牆」,比喻防禦工事堅固,也比喻力量的強大、意志的堅定
相關： 銅牆鐵壁 近義詞