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退耕还草
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退耕还草
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conversion of degraded farmland into grassland
退耕还草
中国实行的无偿给予农民粮食和补助,让其不再在坡耕地上种植粮食而改为种草,以防治坡耕地严重水土流失的措施。
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feasibility study of biomass power generation
feasibility study of deposit mining
Feasibility Study of Environmental Engineering
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