例如，为了避免进入一个无限循环从而挂起系统，一个使用模拟器(或沙箱)的反病毒系统必须决定何时结束分析。

For example, to avoid getting into an infinite loop, and thereby hanging a system, an anti-virus system that USES an emulator (or a sand box) would have to determine when to terminate the analysis.

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然而，我们都知道不时地会有一些意外发生，例如意想不到的电源故障或者系统挂起。

However, we all know that every now and then, something atypical happens, such as an unexpected power failure or system lock-up.

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硬件的这个低级区域允许您从特定的设备（如 CD 或网络）启动重新设置挂起的系统，或允许您进入单用户模式。

This low-level area of the hardware allows you to reset a hung system, boot from a specific device (like a CD or a network boot), or get into single-user mode.

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