英语词汇“concentric castles”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	concentric castles
释义	concentric castles concentric castles Two fortified castles, one within the other, having concentric lines of defense; the inner curtain wall rises higher than the outer, thus providing lines of fire at an enemy at two different levels.
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