I think jy101 has answered this kind of question couple of times

来源: nonego 于 2009-09-23 08:54:44 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (61 bytes)

http://web.wenxuecity.com/BBSView.php?SubID=tzlc&MsgID=183669

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