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单词 line of defense
释义 line of defense
1. : an artificial or natural barrier that can be readily employed for defense against invasion or attack (as a line of fortifications, a river, or a narrow pass)
2. : an organization of military land forces with which a nation seeks to maintain its integrity against armed aggression or invasion
 < the standing army usually forms a nation's first line of defense >
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更新时间:2024/11/10 21:58:09