According to the cognition, a unified product structure data model is established step by step which organizes the life cycle data together. Thus the data is unitive and can be Shared.
按照认知学规律，逐步构建出了一个统一产品结构数据模型，将产品全生命周期数据组织在一起，实现了产品数据的一致性和共享性。
In a typical software development life cycle, data management is required in the following areas.
在典型的软件开发生命周期内，在下面的领域内需要数据管理。
In a typical software development life cycle, data management is required in the following areas.
在典型的软件开发生命周期内，在下面的领域内需要数据管理。
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