剑桥词典a piece of leather or other material to which a group of keys is fastened , or a chain or piece of material used, especially in the past, to fasten a watch to a man's waistcoat 钥匙链；（尤指旧时的）怀表短链 a key fob 钥匙链 a fob watch 带表链的怀表 返回 fob