noun 下载 🔗分享 鞋底,外底 The underside of a shoe, which makes contact with the floor. Examples : "The outsole of my running shoe is worn out from all the miles I've run. " 我跑步鞋的外底因为跑了太多里程都磨损了。 wear part material 与AI对话词汇游戏阅读练习