The data model may be developed top-down solely based on business requirements or bottom-up through reverse engineering of existing data structures.
数据模型可以采取自上而下的方法根据业务需求单独开发，也可以采取自下而上的方法通过对已有数据结构进行反向工程来开发。
Yuken has a model for your engineering requirements.
油研已为您的工程要求的模式。
With requirements of designing an adiabatic capillary tube in engineering, an approximate analytic solution to the tube length derived from the approximate integral model is developed.
为适应毛细管的工程设计要求，在绝热毛细管积分近似模型的基础上，提出壅塞流动下绝热毛细管长度的近似解析解。
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