铜墙铁壁 tóngqiángtiěbì impenetrable defense Definitions Defs Origin Strokes Stroke Words Sentences Sents 铜墙铁壁 (銅牆鐵壁) tóngqiángtiěbì impenetrable defense idiom copper wall and iron bastion; an impenetrable defense Frequency Movie subtitles 0.150 per million appears in 0% of films Written text 0.504 per million Sources Definitions CC-CEDICT Frequency data SUBTLEX-CHBCC Corpus (BLCU)
铜墙铁壁 (銅牆鐵壁) tóngqiángtiěbì impenetrable defense idiom copper wall and iron bastion; an impenetrable defense Frequency Movie subtitles 0.150 per million appears in 0% of films Written text 0.504 per million Sources Definitions CC-CEDICT Frequency data SUBTLEX-CHBCC Corpus (BLCU)
