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.
在类unix的系统中，system调用命令shell，后者负责对发送给自己的文本进行解释。
In Unix-like systems, system invokes the command shell, which then interprets the text sent to it.
如果在CLP命令模式下使用了特殊字符，那么这些特殊符号将由操作系统shell解释。
If special characters are used in CLP command mode, they are interpreted by the operating system shell.
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