源多说明通过你的apt能安装更多软件，如果下列链接有效，就将它加到你的sources.list (注意顺序，将速度最快的放在最前头，apt会默认用前面的链接下载软件)
deb
ftp://ftp.sjtu.edu.cn/sites/archive.ubuntu.com breezy main restricted universe multiverse
deb
ftp://ftp.sjtu.edu.cn/sites/archive.ubuntu.com breezy-updates main restricted universe multiverse
deb
ftp://ftp.sjtu.edu.cn/sites/archive.ubuntu.com breezy-security main restricted universe multiverse
deb
http://archive.ubuntu.org.cn/ubuntu breezy main restricted universe multiverse
deb
http://archive.ubuntu.org.cn/ubuntu breezy-updates main restricted universe multiverse
deb
http://archive.ubuntu.org.cn/ubuntu breezy-security main restricted universe multiverse
deb
http://archive.ubuntu.org.cn/ubuntu-cn breezy main universe multiverse restricted
deb
http://archive.ubuntu.org.cn/ubuntu hoary main restricted universe multiverse
deb
http://archive.ubuntu.org.cn/ubuntu hoary-security main restricted universe multiverse
deb
http://archive.ubuntu.org.cn/ubuntu hoary-updates main restricted universe multiverse
deb
http://archive.ubuntu.org.cn/ubuntu-cn ubuntu.org.cn main universe multiverse restricted
deb
http://archive.ubuntu.org.cn/ubuntu hoary-backports main universe multiverse restricted
deb
http://archive.ubuntu.org.cn/backports hoary-extras main universe multiverse restricted
deb-src
http://archive.ubuntu.org.cn/ubuntu hoary main restricted universe multiverse
deb-src
http://archive.ubuntu.org.cn/ubuntu hoary-security main restricted universe multiverse
deb-src
http://archive.ubuntu.org.cn/ubuntu hoary-updates main restricted universe multiverse
deb
http://helix.alioth.debian.org/deb sid main non-free
deb-src
http://helix.alioth.debian.org/deb sid main non-free
deb
http://ubuntu.cn99.com/ubuntu/ breezy main restricted universe multiverse
deb
http://ubuntu.cn99.com/ubuntu/ breezy-updates main restricted universe multiverse
deb
http://ubuntu.cn99.com/ubuntu/ breezy-security main restricted universe multiverse
deb
http://ubuntu.cn99.com/ubuntu-cn/ breezy main restricted universe multiverse
deb
http://ubuntu.cn99.com/backports/ breezy-extras main restricted universe multiverse
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