deb http://mirrors.163.com/ubuntu/ quantal main universe restricted multiverse
deb-src http://mirrors.163.com/ubuntu/ quantal main universe restricted multiverse
deb http://mirrors.163.com/ubuntu/ quantal-security universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ quantal-security universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ quantal-updates universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ quantal-proposed universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ quantal-proposed universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ quantal-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ quantal-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ quantal-updates universe main multiverse restricted