The BIOS has many jobs, such as initial testing of basic components (such as the system's memory) and determining how to boot the operating system.
BIOS需要执行很多工作，例如对基本组件(例如系统内存)进行初始测试，确定如何引导操作系统。
It locates the operating system image in the partition, loads the boot image into memory, and transfers control for booting.
它可以在分区中定位操作系统映像，将启动映像加载到内存中，并为启动传输控制。
At operating system boot time, the system administrator selects which profile a partition is booted with.
在操作系统启动时，系统管理员选择用来启动分区的配置文件。
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