介绍了国际上通行的体系概念，通过实例阐述了常见的体系类型，从多个维度描述了系统与体系的区别，根据实践总结，提出体系与系统的核心界定准则，并结合工程实践进行了详细描述。
This paper introduces the concept and research progress of SoS, expounds the common type of SoS through example, and describes the difference between system and system from multiple dimensions. According to the practice summary, this paper puts forward the core definition criterion of system and SoS, and describes it in detail in combination with engineering practice.
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