嗯，本来是个特精确的俗π，现在是看不到，很难理解的微π啦。：）

来源: 枣儿~ 于 2010-12-20 10:22:07 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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