英汉例句

• the mapping strategies from object model to relational database model are the core of object-oriented relational database design.

  结合油气储运网络管理系统的一期工 程实践，对对象模型向关系数据库模式映射的策略进行了讨论。

• making reference to historical relational database model and extending traditional relational database, a temporal database model was proposed to distributed simulation data collection system.

  参考历史关系数据库模型，对传统关系数据库进行扩展，提出适用于分布仿真数据收集的时态数据库模型；

• in the following sections we will consider both the relational database model and the object-oriented database model.

  在下一节中，我们将研究关系数据库模型和面向对象的数据库模型。

• rough relational database model is multi-valued information system essentially, inheriting and extending classical rough sets theory. but there is much difference between them.

  粗糙关系数据库模型从本质上来说就是多值信息系统，它继承和扩展了经典的粗糙集理论，但与经典粗糙集理论又有着很大的不同。

• the definition of multi-valued information system is extended and the spatial structure of rough relational database model is analyzed in this paper.

  粗糙关系数据库模型从本质上来说就是多值信息系统，它继承和扩展了经典的粗糙集理论。

• an general item bank is designed for on-line examination. according to the demands of the canonical item bank design, a relational database model is designed.

  设计了一种适合于在线考试系统的通用试题数据库，根据规范数据库设计的要求，设计了试题库的关系模型。