A hypervisor is a software virtualization program that provides a layer of abstraction between operating systems and physical resources on a machine.

管理程序指的是一种软件虚拟化程序，它在操作系统和机器物理资源之间提供了一个抽象层。

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As a software layer between embedded operation system and hardware in embedded system, HAL (hardware Abstraction layer) is a key problem of embedded application.

在嵌入式系统中，硬件抽象层作为嵌入式操作系统和硬件之间的软件层次是嵌入式应用的一个关键问题。

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As a software layer between embedded operation system and hardware in embedded system, HAL (hardware Abstraction layer) is a key problem of embedded application.

针对嵌入式系统开发平台构建中的硬件环境差异问题，给出了一种高移植性的硬件抽象层设计方案，并介绍了实现方法。

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The TAL provides a layer of abstraction that takes care of any difference in devices capabilities or controls, so that software built using it will continue to run on anything added to the BBC's certified list without the need for a new version.

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