The system includes five modules: a knowledge base, a data base, an inference engine, user-computer interface and explanation facility.
系统由知识库、推理机、数据库、人机接口和解释机构等五个模块组成。
This paper describes the concept and organization of expert system and explains in some detail knowledge base and inference engine.
本文介绍专家系统的概念，主要组成，较为详细地阐述了知识库和推理工具的基本内容。
This paper mainly introduces the basic structure of the system, knowledge and knowledge base, and inference mechanism.
主要介绍了系统的基本结构、知识及知识库、系统的推理机构等。
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