基本解释n.防火线；消防警戒线；火灾最前线；交通封锁线同根派生 英汉例句用作名词 (n.)Many men were killed when we crossed the enemy's line of fire.我们越过敌人的火力封锁线时，好些人阵亡了。He disguised himself as a merchant and managed to pass through the blockade line.他化装成商人，混过了封锁线。