当我尝试安装 Makerbot 时，我得到了这个：
W：无法获取 http://??downloads.makerbot.com/makerware/ubuntu/dists/trusty/InRelease
W：无法获取 http://??downloads.makerbot.com/makerware/ubuntu/dists/trusty/Release.gpg 无法解析“??downloads.makerbot.com”
请帮忙
apt
apt ×1