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通过对凡河镇绿化后２４年的效益进行全面分析评价，证明了平原绿化的必要性，论述了农田防护林建设一举多得的重要意义
Through the comprehensive analysis and appraisal of the benefits of the 24 years after the greening in Fanhe Town, the necessity of afforestation in the plain is proved, and the important significance of the construction of farmland shelterbelt is fulfilled