noun 下载 🔗分享 牙膏,洁牙剂 Toothpaste or any other substance, such as powder, for cleaning the teeth. Examples : "My dentist recommended a fluoride dentifrice to help strengthen my teeth and prevent cavities. " 我的牙医推荐我使用含氟牙膏,以帮助我坚固牙齿,预防蛀牙。 substance medicine item utility 与AI对话词汇游戏阅读练习