以上来源于: WordNet
The implementation of agricultural land classification, gradation and valuation metadata system.
农用地分等定级估价元数据体系的实现。
The implication of agricultural land resources security and its causes were analyzed. The standard plot system of agricultural land classification and its function were discussed.
该文首先分析了农用地资源安全的含义及其产生原因,论述了农用地分等标准样地体系及其基本功能;
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