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草地有害生物综合治理
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草地有害生物综合治理
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草地有害生物综合治理
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integrated pest management on grassland
草地有害生物综合治理
以草地农业生态系统理论为基础,综合运用各种防治技术,将有害生物的种群数量控制在经济损失阈值允许的范围之内的草地保护措施,
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geographical polymorphism
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geographical race
geographical regionalization in China
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geographic distribution of cancers
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