hypervisor（不管是什么类型）仅是一个从其来宾操作系统抽象机器硬件的分层应用程序。

So a hypervisor (regardless of the type) is just a layered application that abstracts the machine hardware from its guests.

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为实现卫星自维护遥操作系统中稳定可靠的视频反馈目标，提出一种基于分层码率控制的视频传输策略。

To realize the stable video feedback in the satellite self-servicing telerobotics system, a scheme based on scalable bit rate control is proposed.

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