每个硬件部分都有自己的命令集，操作系统通过这些命令集控制硬件并与硬件通信。
Each hardware part exposes its own set of commands that enables the Operating System to control and communicate with it.
Shell对你在命令行中键入的命令进行解释，并与操作系统的其它部分进行通信。
The shell is what interprets the commands you type on the commandline, and thus communicates with the rest of the operating system.
Shell对你在命令行中键入的命令进行解释，并与操作系统的其它部分进行通信。
The shell is what interprets the commands you type on the command line, and thus communicates with the rest of the operating system.
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