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。
A hypervisor is a software virtualization program that provides a layer of abstraction between operating systems and physical resources on a machine.
使用全虚拟化，在虚拟化的操作系统和硬件之间存在一个层，用于决定访问。
With full virtualization, a layer exists between the virtualized operating systems and the hardware as a way to arbitrate access.
如图5所示，来宾操作系统包含一个Lguest代码瘦层(根据定义，就是准虚拟化)。
As shown in Figure 5, the guest operating system includes a thin layer of Lguest code (by definition, paravirtualization).
虚拟机管理程序(hypervisor)是一个较薄的虚拟化软件层，它抽象化来自服务器平台的操作系统和应用程序。
The hypervisor is a thin layer of virtualization software that abstracts the operating system and applications from the server platform.
首先，类似于将用户空间应用程序和内核函数连接起来的系统调用，一个通常可用的虚拟化调用(hapercall, hypervisor对操作系统进行的系统调用)层允许来宾系统向宿主操作系统发出请求。
First, similar to system calls that bridge user-space applications with kernel functions, a hypercall layer is commonly available that allows guests to make requests of the host operating system.
首先，类似于将用户空间应用程序和内核函数连接起来的系统调用，一个通常可用的虚拟化调用(hapercall, hypervisor对操作系统进行的系统调用)层允许来宾系统向宿主操作系统发出请求。
First, similar to system calls that bridge user-space applications with kernel functions, a hypercall layer is commonly available that allows guests to make requests of the host operating system.
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