用YUM既可以下载和安装新包，也可以更新系统中所有现有的包。
With YUM, you can download and install new packages as well as update all existing packages on a system.
Google现在计划将Flash捆绑至Chrome下载中，使其成为Chrome自动更新系统的一部分。
Google now plans to bundle Flash with Chrome downloads, and to make it part of Chrome's automatic update system.
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