So a good virtualization system has an ability to measure the cost of each different type of request in terms of computing power required to process the request.

因此，一个好的虚拟化系统应能够根据处理请求所需的计算能力来度量每个不同请求类型的成本。

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The system must also be able to determine the current percentage of that computing power that is in use at any moment and must be able to continuously distribute that information.

该系统还必须能够确定在任何时刻正在使用的计算能力的当前百分比，而且能够不停地分发这些信息。

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Computers in the cloud are configured to work together and the various applications use the collective computing power as if they are running on a single system.

云中的计算机一起工作，各种应用程序使用同一计算能力集合，好像它们在单一系统上运行一样。

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