绝对正确，所以每次吃完东西一定要清理干净牙齿，就不容易形成牙石，也不容易引起牙龈萎缩！

来源: GraceX 于 2018-07-07 11:31:57 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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