tooth root n. 牙根 例句与用法: A small boil or abscess on the gum, often resulting from tooth decay. 龈脓肿牙床上生的小疖或肿块,常由龋牙引起 词形变化: 名词复数: teeth | 动词过去式: toothed | 动词过去分词: toothed | 动词现在分词: toothing | 动词第三人称单数: tooths |