The system has powerful function of inquiry and appraisal, with which the database will be accessed frequently.

该系统强大的查询和评价功能在执行中需要对数据库进行频繁操作。

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At first, through analyse the influence on the soil, crops, groundwater and function of water body of sewage, the index system of sewage irrigation security appraisal have been set up.

首先，通过污水对土壤、农作物、地下水以及水体功能的影响分析，建立了污水灌溉安全性评价的指标体系。

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It is important to research on the distribution rule of the regional soil carbon pool for the study of global change, soil fertility and ecosystem function appraisal.

研究区域土壤碳库的分布特征对于全球变化研究、土壤肥力和生态系统的功能评价具有重要意义。

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