……
读取：10 http://mirrors.163.com squeeze/contrib i386 Packages [54.1 kB]
读取：11 http://mirrors.163.com squeeze/non-free i386 Packages [108 kB]
忽略 http://mirrors.163.com squeeze/main i386 Packages
忽略 http://mirrors.163.com squeeze/non-free i386 Packages
读取：12 http://mirrors.163.com squeeze-updates/main i386 Packages [14.8 kB]
读取：13 http://mirrors.163.com squeeze-updates/contrib i386 Packages [14 B]
读取：14 http://mirrors.163.com squeeze-updates/non-free i386 Packages [14 B]
读取：15 http://mirrors.163.com squeeze-backports/main i386 Packages [376 kB]
错误 http://mirrors.163.com squeeze/main i386 Packages
404 Not Found [IP: 123.58.173.89 80]
错误 http://mirrors.163.com squeeze/non-free i386 Packages
404 Not Found [IP: 123.58.173.89 80]
已下载 7,494 kB，耗时 31秒 (236 kB/s)

当前状态：17 个被更新 [-52], 1347 个新软件包 [+582]。

……
忽略 http://mirrors.sohu.com/debian-backports/ squeeze-backports/non-free Translation-zh
忽略 http://mirrors.sohu.com/debian-backports/ squeeze-backports/non-free Translation-zh_CN
读取：7 http://mirrors.sohu.com squeeze Release [107 kB]
命中 http://security.debian.org squeeze/updates/contrib i386 Packages
命中 http://security.debian.org squeeze/updates/non-free i386 Packages
命中 http://deb.opera.com stable/non-free i386 Packages
读取：8 http://mirrors.sohu.com squeeze-updates Release [113 kB]
读取：9 http://mirrors.sohu.com squeeze Release [24.0 kB]
E: Release 文件已过期，忽略 http://mirrors.sohu.com/debian/dists/sq ... es/Release (从 8天 4小时 46分 46秒 起无效)