中国开放科研知识云: 检索

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821.4 Agricultural Products;901 Engineering Profession;901.4 Impact of Technology on Society;821.3 Agricultural Methods;913.1 Production Engineering;922.2 Mathematical Statistics;971 Social Sciences;921.5 Optimization Techniques;817.1 Polymer Products;443.3 Precipitation;446.1 Water Supply Systems;454.3 Ecology and Ecosystems;443.1 Atmospheric Properties;461.9 Biology;801.4 Physical Chemistry;802.3 Chemical Operations;483.1 Soils and Soil Mechanics 1	农业基础科学 1	农学 1
农学(农艺学) 1	地球科学::地质 1	灾害学 1

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