mark off 划出, 划线分隔 例句与用法: She wiped the dirty marks off. 她把脏痕迹擦掉了。 The boundaries are clearly marked off on the map. 边界的划分在地图上标得很清楚。 词形变化: 动词过去式: marked | 动词过去分词: marked | 动词现在分词: marking | 动词第三人称单数: marks |