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path of agricultural technology progress
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path of agricultural technology progress
Encyclopedia
经济学
速水-拉坦诱导性创新理论
释
path of agricultural technology progress
农业技术进步道路
农业生产中先进技术对落后技术的替代方式。表现为用同样多的农业资源可以生产出更多的农产品,或者生产同样多的农产品只需要投入比以前更少的农业资源。
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birth control
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birthday attack
birthday bronze mirror for Emperor Xuanzong
Birthday Opera Performance at the Qing Court
birthday problem
birth,death and catastrophe process
birth death chain
birth-death chain
birth death process
birth-death process
birth defect
birth defect prevention
birth defects
birth process
birth rate
birth registration
birth statistics
birth weight of piglets
birthwort family
Biruni
Biru Xian
BIS
bis (1,5-cyclooctadiene) nickel (0)
bis (2-ethylhexyl) 2,2'-(dioctylstannaediyl) bis (sulfanediyl) diacetate
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