动态链接在数据库不再支持的条件下，变成死链接。
Dynamic link is no longer supported in the database under the conditions become dead links.
通过对土地利用图的空间分析，结合统计资料，将属性数据和空间数据链接，建立起区域土地利用动态变化数据库。
By analyzing land use maps, combining statistic materials, connect the spatial data and attribute data and build dynamic change data base of land use.
本文针对DSS应用开发的特点，采用面向对象的方法，设计了一种动态链接库，解决了跨数据库平台的数据抽取问题。
Based on the characteristic of developing DSS, This paper designs a dynamic link library using OOP, which solves the problem of extracting data from different databases.
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