英语语法分析

Firstly, the main technic. structure of building flood information system has been ascertained in this dissertation, namely, GIS , database and hydrics model of three important aspects.

首先，本文明确了构建洪灾信息系统的主要技术框架，即：GIS技术、数据库技术和水文专业模型设计三个主要方面。