运行于模拟器中的系统（称为客户系统（guest system））不需要任何修改（或者，最多需要一些保证 OS 平稳工作的补丁）。

The system running inside the emulator (called the guest system) won't need any modification (or at most, a few patches to guarantee that the OS works smoothly).

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验收测试(也被称为功能测试)是由客户指定来测试整个系统是否完成既定功能。

Acceptance Tests (also known as Functional Tests) are specified by the customer to test that the overall system is functioning as specified.

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这种新模式就称为客户模式，顾名思义，它用来执行客户操作系统代码(至少是一部分代码)。

The new mode is called guest, and as the name suggests, it's used for execution of guest operating system code (or at least some of it).

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