应用程序的需求决定需要安装产品的哪些特性。
The application will dictate which features need to be installed for the product.
这意味着，如果您提供一个需要安装的应用程序，那么它必须能够合理地安装到现有的基础设施中。
This means that if you provide an application to be installed, it must install reasonably into an existing infrastructure.
当应用程序服务器启动时，它搜集该服务器上安装的任何应用程序需要的所有运行时组件，并且仅在需要时才启动那些组件。
When the application server starts up, it accumulates all the run time components that any application installed on that server requires and only starts those components that are necessary.
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