| 单词 | 铜墙铁壁 |
| 释义 | 铜墙铁壁铜墙铁壁[tóng qiáng tiě bì]1.■iron bastions; a bastion of iron; a stronghold; a wall of bronze or iron; impregnable fortress; iron walls; like walls of brass and iron; a tower of strength; be strong as) walls of bronze |
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