A virtual machine is one operating system (OS) that is being managed by an underlying control program allowing it to appear to be multiple operating systems.

虚拟机是一个由底层控制程序管理的操作系统(OS)，这让它看起来像多个操作系统。

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QEMU includes a monitor console that allows you to inspect a running guest operating system as well as control various aspects of the virtual machine (VM).

QEMU包含一个监测控制台，它允许检查运行中的来宾操作系统并控制虚拟机(VM)各部分。

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With EC2, customers create their own Amazon Machine Images (AMIs) containing an operating system, applications, and data, and they control how many instances of each AMI run at any given time.

使用 EC2，客户可以创建自己的 Amazon Machine Images (AMI)，包括操作系统、应用程序和数据，并控制在给定的时候每个 AMI 有多少实例运行。

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