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。

youdao

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)。

youdao

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。

youdao

She has pledged U.S.support in a number of areas, including helping Pakistan repair and upgrade key electricity generating stations as the country faces severe power shortages.

VOA: standard.2009.10.28

In an item on the airline lobby, we tagged a group of companies that could get a boost from the push to upgrade U.S. air traffic control technology.

FORBES: Magazine Article

Direct data communications between planes and pilots is a crucial part of air-travel modernization, and it's an upgrade the U.S. has been trying to implement for more than a decade without success.

WSJ: Texting While Flying: Help for Pilots

Some webOS developers were irritated that HP did not upgrade the U.S. versions of the Pre and Pre Plus with the 2.0 version of webOS when the platform was updated last fall.

FORBES: HP webOS Developers Await TouchPad, Pre3 With Questions, Optimism