Good article. Thanks for sharing it.

来源: eyeyey 于 2009-02-18 07:14:56 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (66 bytes)
本帖于 2009-02-19 05:00:15 时间, 由版主 林贝卡 编辑

It takes time to use back mouth as we get so used to front mouth.

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