因为ActiveRecord的大部分代码存在的原因是对象和关系型数据库的不匹配现象，许多ActiveRecord的代码都将变得毫无必要。

Since much of ActiveRecord is there because of the impedance mismatch between objects and relational databases, a lot of ActiveRecord will be unnecessary.

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使用对象关系型数据库来一体化存储和管理海量的GIS基础图形数据和属性数据是近年来GIS领域研究的一项重点内容。

It is an important research content of GIS fields in the recent years to store and manage mass GIS basic graphics data and attribute data using object-relation database.

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该系统是对象关系型数据库管理系统OSCAR客户端的重要组成部分，分为两部分实现：预处理模块和ESQL运行库。

The system plays a crucial role in the client part of OSCAR, an object relational database management system. It includes two components: preprocess module and ESQL runtime library.

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