有用的，走路時幫助平衡，否則會摔跤。人體其實沒有無用的器官包括以前認為無用的闌尾和扁桃體

來源: 寶寶抱抱於 2019-02-18 19:47:32 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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