deb http://mirrors.cloud.tencent.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ focal-updates main restricted universe multiverse
#deb http://mirrors.cloud.tencent.com/ubuntu/ focal-proposed main restricted universe multiverse
#deb http://mirrors.cloud.tencent.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-updates main restricted universe multiverse
#deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-proposed main restricted universe multiverse
#deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-backports main restricted universe multiverse