noun 下载 🔗分享 系带，小系带 A small fold of tissue that prevents an organ in the body from moving too far. Examples : "Humans have three oral frenulums: beneath the tongue, between the upper lip and gum, and between the lower lip and gum." 人类口腔内有三处系带：舌头下方、上唇与牙龈之间、以及下唇与牙龈之间。 anatomy physiology medicine body organ part 与AI对话词汇游戏阅读练习
