noun 下载 🔗分享 牙膏,洁牙剂 Toothpaste or any other substance, such as powder, for cleaning the teeth. Examples : "The store sells many kinds of dentifrices, including toothpaste and tooth powder. " 这家商店售卖多种洁牙剂,包括牙膏和牙粉。 substance medicine utility 与AI对话词汇游戏阅读练习