ubuntu-16.04.4-desktop-amd64.iso
magnet:?xt=urn:btih:778CE280B595E57780FF083F2EB6F897DFA4A4EE&dn=ubuntu-16.04.4-desktop-amd64.iso&tr=http%3A%2F%2Ftorrent.ubuntu.com%3A6969%2Fannounce&dn=ubuntu-16.04.4-desktop-amd64.iso&tr=http%3A%2F%2Fipv6.torrent.ubuntu.com%3A6969%2Fannounce&xc=TorrentRTSearch
这个是官网的
