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退耕还林还草工程
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退耕还林还草工程
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退耕还林还草工程
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green for grain project in China
退耕还林还草工程
将水土流失严重的耕地,沙化、盐碱化、石化严重的土地以及产量低而不稳的耕地停止耕种,因地制宜地造林种草,恢复植被的工程项目。
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common single mode fiber
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common symptoms of cortical dysfunction of the nervous system
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Common Understandings in 1992
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