拼音: tóng chéng tiě bì
注音: ㄊㄨㄥˊ ㄔㄥˊ ㄊ一ㄝˇ ㄅ一ˋ
解释: 见“铜墙铁壁”。
出处: 清·严如熤《三省边防备览·策略》:“民间之作寨堡者,亦饬令仿效为之,处之铜城铁壁矣。”
用法: 作主语、宾语;指十分坚固。
The original metaphor is that the defense is very strong and cannot be destroyed. It is also a metaphor for unity. The same as "iron wall".
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