sudo apt-get upgrade 升级包 ; 进行系统升级 ; 升级
apt-get upgrade 进行系统升级 ; 更新系统 ; 下载且更新 ; 更新已安装软件
sudo apt-get dist-upgrade 升级系统
apt-get dist-upgrade 发行版升级 ; 智能更新软件
sudo apt-get dist -upgrade 升级系统
get upgrade
得到升级
以上为机器翻译结果，长、整句建议使用 人工翻译 。
"To get back to the 1998 level of production, Venezuela would need to invest for the next 10 years to upgrade its petroleum operations.
VOA: standard.2010.08.06
"I would say it's definitely not a must-get upgrade, and I think it has been relatively low-profile launch for a reason, " Arar said.
CNN: Microsoft launches new consumer Windows program
Hardware should get an upgrade as well through a premium system with a 9.2-inch, 720p display.
ENGADGET
Capitalizing on the 4G networks, Apple announced its popular video service, FaceTime, would get an upgrade as well.
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