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high frequency propagation
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high frequency propagation
Encyclopedia
理学
哺乳动物繁殖控制技术
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high frequency propagation
高频繁殖
在现代营养、饲养技术和繁殖技术基础上形成的提高繁殖效率的繁殖控制技术。
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grassland ecological water requirement
grassland ecosystem
grassland ecosystem services
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grassland hydrology
grassland hydrology and water resources
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