求翻译：ESDCM是对复杂机电产品开发链相关信息与知识的概念化，通过分析复杂机电产品开发所涉及的领域与知识，依据上述概念与关系的构建过程，建立了与复杂机电产品开发链有关的概念集合，该集合涉及开发组织、产品、开发活动、开发资源四个领域的概念、语义描述及其属性和实例。是什么意思？

ESDCM is the complex electro-mechanical product development chain-related information and knowledge of the conceptualization, through analysis and knowledge in the field of complex electro-mechanical product development involved, pursuant to the above concept and the construction of the relationship between process, the establishment of the complex electro-mechanical product development chain and concepts relating to the collection, the collection related to development organizations, products, development activities, the exploitation of resources in four areas of conceptual and semantic description and attributes, and instances.