在客户模式中有两种标准模式，因此客户操作系统在客户模式中运行可以支持标准的内核，而在用户模式下运行则支持自己的内核和用户空间应用程序。
Within guest mode are the standard two modes, so that a guest operating system runs in guest mode but supports the standard kernel and user modes for its kernel and user-space applications.
负责支持应用程序启动和运行时（特别是在生产环境中）的现场支持的主要活动。
Responsible for supporting the activities essential for ongoing support of the application when it is up and running, especially in the production environment.
该模型分为五个层，即：环境支持层、运行平台支持层、物理管理层、映射层和应用层，并具体讨论了每一层的功能和开发方法。
The model consists of five layers which are environment support layer, running platform support layer, physical management layer, mapping layer, and application layer.
该模型分为五个层，即：环境支持层、运行平台支持层、物理管理层、映射层和应用层，并具体讨论了每一层的功能和开发方法。
The model consists of five layers which are environment support layer, running platform support layer, physical management layer, mapping layer, and application layer.
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