无法安装vim-gnome(转载）
https://askubuntu.com/questions/1208159/how-do-i-install-vim-gnome-on-ubuntu-19-10#:~:text=Done%20Package%20vim-gnome%20is%20not%20available%2C%20but%20is,source.%20E%3A%20Package%20%27vim-gnome%27%20has%20no%20installation%20candidate.
