任何操作系统中的桌面环境只是系统核心之上简单的一层，使用它能更方便地和计算机交互。
The familiar windowed desktop of any operating system is simply a layer on top of the core code that makes it easier for you to interact with your computer.
为了在核心层和控制层间建立联系，需要一个操作系统：Linux 或 Windows。
To bridge the core and controls layers, you need an operating system â “ Linux or Windows.
这对深入理解操作系统核心层，透析进程原理，发现和研究新的调度算法具有重要意义。
This has the vital significance to catch on the kernel layer of operating system, to dialyse process principle, to discover and study the new Scheduling Algorithm.
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