毕竟，FreeBSD是一个多用户多任务的操作系统。
这包括一个文件系统和新的多任务操作系统本身。
This included a file system as well as the new multi-tasking operating system itself.
在多任务操作系统中我一个任务切换到另一个的过程。
Thee process of switching from one task to another in a multitasking operating system.
在多任务操作系统中我一个任务切换到另一个的过程。
Thee process of switching from one task to another in a multitasking operating system.
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