deb http://debian.ustc.edu.cn/ubuntu/ precise main multiverse restricted universedeb http://debian.ustc.edu.cn/ubuntu/ precise-backports main multiverse restricted universedeb http://debian.ustc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universedeb http://debian.ustc.edu.cn/ubuntu/ precise-security main multiverse restricted universedeb http://debian.ustc.edu.cn/ubuntu/ precise-updates main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ precise main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ precise-backports main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ precise-security main multiverse restricted universedeb-src http://debian.ustc.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

IPv6-Only 地址

deb http://mirrors6.ustc.edu.cn/ubuntu/ precise main multiverse restricted universedeb http://mirrors6.ustc.edu.cn/ubuntu/ precise-backports main multiverse restricted universedeb http://mirrors6.ustc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universedeb http://mirrors6.ustc.edu.cn/ubuntu/ precise-security main multiverse restricted universedeb http://mirrors6.ustc.edu.cn/ubuntu/ precise-updates main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise-backports main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise-proposed main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise-security main multiverse restricted universedeb-src http://mirrors6.ustc.edu.cn/ubuntu/ precise-updates main multiverse restricted universe