學習了。那後天的努力，刷牙能起到多大的預防作用呢？老虎不刷牙，也沒見到動物園的老虎，牙疼的轉圈圈。

來源: 禦用文人於 2015-01-05 22:15:52 [舊帖] [給我悄悄話] 本文已被閱讀：次

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