本文讨论了MMRTS的设计思想、结构及其功能特点，也扼要介绍了所设计的系统调用命令。
In this paper, the design principles, structure and functional features of a MMRTS operating system are described. Its system-call commands is also briefly introduced.
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.
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