http://www.cybercorlin.net/2009/10/12/%e6%88%91%e4%bb%ac%e7%9a%84%e6%96%b0%e5%ae%b6%ef%bc%8c%e5%9c%a8google-eeath%e4%b8%8a%e4%b8%8b%e7%9d%80%e9%9b%aa%e5%91%a2%e3%80%82/ 每天进步一点点 hourly 1 http://wordpress.org/?v=3.0.1