当您升级服务器上的应用程序和操作系统时，您可以一次性为所有用户更新所有组件。
When you upgrade the applications and operating systems on your servers, you upgrade all the components for all users in one effort.
如同系统测试环境的情况一样，一个应用程序只测试一次。
As with a system test environment, one application is tested at a time.
这些目录都准备就绪后，您就可以开始为想要支持的每种操作系统和配置进行每个应用程序的一次构建了。
With the directories in place, you can start to build each application once for each operating system and configuration that you want to support.
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