推荐1：阿里云
阿里云镜像源拥有全球节点，适合几乎所有地方的服务
deb https://mirrors.aliyun.com/debian/ bookworm main contrib non-free non-free-firmware
deb-src https://mirrors.aliyun.com/debian/ bookworm main contrib non-free non-free-firmware
deb https://mirrors.aliyun.com/debian/ bookworm-updates main contrib non-free non-free-firmware
deb-src https://mirrors.aliyun.com/debian/ bookworm-updates main contrib non-free non-free-firmware
deb https://mirrors.aliyun.com/debian/ bookworm-backports main contrib non-free non-free-firmware
deb-src https://mirrors.aliyun.com/debian/ bookworm-backports main contrib non-free non-free-firmware
deb https://mirrors.aliyun.com/debian-security/ bookworm-security main contrib non-free non-free-firmware
deb-src https://mirrors.aliyun.com/debian-security/ bookworm-security main contrib non-free non-free-firmware