Using the appliance, these customizations can be delivered at each layer of the software stack, from the operating system all the way up to the middleware and your applications.
通过使用该设备，从操作系统一直到中间件和您的应用程序，可以在软件栈的每一层上实现这些定制。
A software appliance is a full application stack containing the operating system, the application software and any required dependencies, and the configuration and data files required to operate.
所谓软件设备，实际上就是一个完整的应用栈，包括操作系统、应用软件、所需的任何依赖以及与操作相关的配置与数据文件。
You can think of a virtual appliance, then, as a software stack that incorporates the target applications, libraries, services, configuration, relevant data, and operating system.
您可以将虚拟设备视为一个软件堆栈，这个软件堆栈包含目标应用程序、库、服务配置、相关数据和操作系统。
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