RDBMS is based on firm mathematics set theory with simple and clear data structure, and powerful query function, so it has become the basic technology for realization of information system.

因为RDBMS是建立在严格的数学集合论基础上的，数据结构简单、清晰，具有强大的查询能力，RDBMS成为实现信息系统的基本技术。

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The mathematics method on the complete function of integrated broadening optical lineshape for laser material is given. The basic proper ties of the complete lineshape function are analyzed.

本文建立了一种求解激光工作物质综合加宽机制下谱线线型函数统一的数学方法。分析、讨论了激光工作物质在各种加宽机制下光谱线线型函数的基本特性。

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Function is one of the fundamental and basic knowledge in Middle and High school mathematics and its structure contains two clues, one called "explicit clue" and the other "implicit clue".

函数是中学数学重要的基础知识，函数部分结构上具有“一明一暗”两条主线。

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