deb	[arch=amd64,i386] http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
deb-src	[arch=amd64,i386] http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
deb	[arch=amd64,i386] http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src	[arch=amd64,i386] http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
deb	[arch=amd64,i386] http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
deb-src	[arch=amd64,i386] http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
