The course of three information flows coming into being and the essential elements of each flow are discussed by analyzing six activities of product realization.
通过分析产品在实现过程中的六种活动，阐述了这三个信息流的形成过程及每个信息流所包含的必要信息。
The course of three information flows coming into being and the essential elements of each flow are discussed by analyzing six activities of product realization.
通过分析产品在实现过程中的六种活动，阐述了这三个信息流的形成过程及每个信息流所包含的必要信息。
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