它创建一个保存在由内核选项选择的活动交换区中的镜像。
It creates an image which is saved in an active swap partition selected by kernel option.
在常规使用过程中，GRUB 2与GRUB Legacy类似：启动计算机时，当BIOS执行检查后，操作系统和内核选项菜单会出现。
During normal use, GRUB 2 works much like GRUB Legacy: When you boot the computer, just after the BIOS performs its checks, a menu of operating system and kernel options appears.
在这里您将把任何必需的引导选项传递至内核。
This is where you pass any necessary boot options to the kernel.
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