官方的软件源慢得跟蜗牛一样，在设置中指定镜像源又不能生效。请手工修改/etc/apt/sources.list文件。
## Generated by deepin-installer
## 将官方源禁用
## deb [by-hash=force] http://packages.deepin.com/deepin panda main contrib non-free
## 设置清华大学开源软件镜像站
deb [by-hash=force] https://mirrors.tuna.tsinghua.edu.cn/deepin panda main contrib non-free
## 如果设置阿里云，则将地址设置为
deb [by-hash=force] https://mirrors.aliyun.com/deepin/ panda main contrib non-free
#deb-src http://packages.deepin.com/deepin panda main contrib non-free
