Years of RDMBS usage has made programmers view them as ubiquitous, when often they need not be.

多年使用RDMBS已使得程序员将模式视为必不可少，但通常模式并非如此。

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The design of spatial data accessing engine is the key for object RDMBS to memory and query spatial data.

为使对象关系数据库更方便存储和查询空间数据，空间数据访问引擎的设计是关键。

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