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

For Wii owners, backwards compatibility of games and accessories makes the Wii U an affordable upgrade to HD, allowing them to keep their game library but giving them access to more third-party titles and new HD first-party titles.

FORBES: Nintendo Wii U CPU And GPU Clock Speeds Revealed

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