详细介绍了该结构各层次的特点和功能，研究了基于该结构的系统层次和软件体系结构。
The characteristic and function of each layer in this structure and its software architecture were present in detail.
详细介绍了该结构各层次的特点和功能，研究了基于该结构的系统层次和软件体系结构。
The characteristic and function of each layer in this structure and its software architecture were present in detail.
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