In fact, you can use --upgrade/-U to install new software, too, so some administrators use this command rather than --install/-i even for new installations.
事实上，您也可以使用 --upgrade/-U安装新软件，甚至有些管理员对新安装使用该命令，而非 --install/-i。
If you use RPM directly, you should use the — upgrade (-u) option rather than — install (-i).
如果您直接使用rpm，那么应当使用——upgrade (- u)选项，而非——install (- i)。
That is partly because merchants must upgrade their cash-register systems to handle the chip-based CARDS. Most U. s. retailers haven't done so because of costs.
原因之一是商户必须升级收银系统来处理这种芯片信用卡。因为成本的关系，大多数美国零售商都还没有这么做。
U-disk transfer G-code files (cutting track file), also able to transfer system upgrade files to guarantee the latest function to be installed anytime, convenient and efficient.
通用U盘传输G代码文件(切割轨迹文件)，并可传输系统升级文件，使系统功能随时更新，方便快捷。
It hoped that plasmas could form the basis of a compact and stealthy upgrade to the metallic phased-array radars used today on the U. s. Navy's Aegis cruisers and other vessels.
当时人们希望等离子体能够成为一种升级雷达的基础，该雷达体积小而隐蔽，可以替换当今美国海军用在神盾巡洋舰和其他舰艇上的金属相控阵雷达。
U-disk transfer G-code files (cutting track file), also able to transfer system upgrade files to guarantee the latest function to be installed anytime, convenient and efficient.
代码文件(切割轨迹文件)，并可传输系统升级文件，使系统功能随时更新，方便快捷。
Its U. S. marketing, by contrast, just didn't seem to do the trick when it comes to really making a compelling case for an upgrade.
与此相反，美国的市场销售在营造一个引人入胜的升级营销上确实表现不佳。
Its U. S. marketing, by contrast, just didn't seem to do the trick when it comes to really making a compelling case for an upgrade.
与此相反，美国的市场销售在营造一个引人入胜的升级营销上确实表现不佳。
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