Based on analyzing the background, purpose and function of constructing rail transit fundamental database, this paper designed the framework and function of the system.

在分析轨道交通基础数据库平台建设的背景、目的和作用的基础上，对数据库平台的系统总体结构和系统功能进行了设计。

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As a fundamental system to avoid moral danger by policy holder in insurance law, double insurance has importance significance for the realization of the function of insurance.

重复保险制度作为保险法律中一项防范投保人道德危险的基本制度，对保险功能的发挥具有重要意义。

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First, the paper introduces the fundamental structure and function of fiberoptic receiving system and fiber optic data quantizer.

文章首先介绍了光接收系统和光纤数据量化器的基本结构、功能。

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