Read Edit View history 铜墙铁壁 tóngqiángtiěbì impenetrable defense Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 铜墙铁壁/ 銅牆鐵壁 tóngqiángtiěbì impenetrable defense idiom · copper wall and iron bastion; an impenetrable defense 我们的防线像铜墙铁壁一样稳固。 Edit Delete References Add reference No references for this word.
铜墙铁壁/ 銅牆鐵壁 tóngqiángtiěbì impenetrable defense idiom · copper wall and iron bastion; an impenetrable defense 我们的防线像铜墙铁壁一样稳固。 Edit Delete