薛兄提到過骨頭需要壓力才會生長。我在想對牙齒也是同理可證。

來源: 羽衣甘藍於 2016-12-30 17:23:14 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.