应该及时更新磁盘上的内核，确保当系统最终需要重新启动时引导的是最新的内核。
Keeping the kernel on disk up to date ensures that your system boots the best kernel available when your system eventually requires a restart.
当设备或应用程序需要能够在已知的“清除”状态下重新启动时，常常将cleanstart的值设置为true。
A cleanstart value of true is most often used when a device or application needs to be able to restart in a known "clean" state.
当设备或应用程序需要能够在已知的“清除”状态下重新启动时，常常将cleanstart的值设置为true。
A cleanstart value of true is most often used when a device or application needs to be able to restart in a known "clean" state.
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