然而，通过额外的工作可以使自底向上的开发方法支持层次数据模型，因而不会被自动淘汰掉。

With additional work, however, the bottom-up approach can support hierarchical data models and, therefore, should not be automatically dismissed.

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针对航空火控系统结构和检测的特点，设计了一种基于层次数据模型的航空火控系统检测数据库系统。

A test database system for the aeronautic fire control system based on hiberarchy is designed in allusion to the structure and the test characteristic of the aeronautic fire control system.

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针对航空火控系统结构和检测的特点 ，设计了一种基于层次数据模型的航空火控系统检测数据库系统。

This paper makes a study of the application of Direct3D in development of air combat simulation system of airborne FCS (Fire Control System) and introduces the method of software development.

youdao

针对航空火控系统结构和检测的特点 ，设计了一种基于层次数据模型的航空火控系统检测数据库系统。

This paper makes a study of the application of Direct3D in development of air combat simulation system of airborne FCS (Fire Control System) and introduces the method of software development.

youdao