铜墙铁壁 铜墙铁壁：tóngqiángtiěbì基本解释：[bastionofiron,impregnablefortressasawallofbronze;impregnablelikewallsofbrassandiron]亦作“铁壁铜墙”,比喻防御工事坚固,也比喻力量的强大、意志...... 网名集 2021-08-27
