noun 下载 🔗分享 扣件,紧固件。 A hook or similar restraint used to fasten things together; fastener. Examples : "The fastenings on my backpack were broken, so all my books fell out. " 我背包上的扣件坏了,所以书全都掉出来了。 item utility device 与AI对话词汇游戏阅读练习