an area in hostile territory that has been captured and is held awaiting further troops and supplies; "an attempt to secure a bridgehead behind enemy lines"; "the only foothold left for British troops in Europe was Gibraltar" 一層の軍と供給を待ちながら捕捉されて、保持される敵地の領域。
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【下位】 a bridgehead on the enemy's shoreline seized by an amphibious operation; "the Germans were desperately trying to contain the Anzio beachhead" 水陸両生操作で差押えられた敵の海岸線の橋頭堡。
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【上位】 the position where someone (as a guard or sentry) stands or is assigned to stand; "a soldier manned the entrance post"; "a sentry station" 人が（警備または歩哨として）立つ、または立つように指定される位置。
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