短语词组短语base boom defence vessel 基地布网船boom defence vessel 布栅舰船;布栅栏防御船布栅船;布栅栏防御船boom defence detail 栏栅防御boom defence officer 栅栏防御员HisHer Majesty 's Boom Defence Vessel 英国防御战舰defence boom 防御拦障 返回 boom defence