noun 下载 🔗分享 主塔, 城堡主楼 The fortified tower of a motte or early castle; a keep. Examples : "The king retreated to the donjon, the castle's strongest tower, as the enemy breached the outer walls. " 当敌人突破外墙后,国王退守到城堡的主楼,那是城堡里最坚固的塔楼。 architecture building military history 与AI对话词汇游戏阅读练习