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土壤化学改良
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土壤化学改良
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工学
土壤改良
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soil chemical-melioration
土壤化学改良
通过化学方法来改良土壤成分、结构与化学特性,保持与提高土壤肥力,改善土壤农业化学指标,预防或减轻农业的负面影响的活动。
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space absorption
space acuity
space aeronautics
space age
space-air-ground integrated network
space-air vehicle
space analysis algorithm
space analytic geometry
Space and Missile Defence Command Operational Nano-satellite Effect
space application
space application coatings
Space Arts
space aspect of stage
space astrometry
space astronomy
space astrophysics
space at infinity
space attenuation
space average
space axis
space band width product
space bandwidth product
space-bandwidth product
space-base atmospheric remote sensing
Space-Based Infrared System
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