引导程序负责在运行应用程序之前，安装这些系统必备组件。
The bootstrapper is responsible for installing these prerequisites before your application runs.
否则，如果检测到所有的系统必备组件，引导程序将直接启动应用程序的安装程序。
Otherwise, if all the prerequisites are detected, the bootstrapper just starts the application installer.
一个引导程序包是一组目录和文件，其中包含用于说明系统必备组件的安装方式的清单文件。
A bootstrapper package is a group of directories and files that contain manifest files that describe how the prerequisite should be installed.
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