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天文学 33 农作物 28 Plant Sciences 21
天文学::天体物理学 17 天文学::天体物理学::高能天体物理学 14 农学(农艺学) 12
植物保护 11 昆虫学 10 Materials Science, Multidisciplinary 8
农业基础科学 8 Chemistry 7 Ecology 7
物理学 7 Biochemistry & Molecular Biology 6 Pharmacology & Pharmacy 6
Physics 6 植物学 6 Chemistry, Physical 5
Physics, Applied 5 核科学技术 5 Chemistry, Medicinal 4
Chemistry, Multidisciplinary 4 Environmental Sciences 4 Evolutionary Biology 4
Genetics & Heredity 4 Nanoscience & Nanotechnology 4 半导体材料 4
构造地质学 4 环境地球化学 4 矿床地质 4
Environmental Sciences & Ecology 3 Forestry 3 Geography, Physical 3
Meteorology & Atmospheric Sciences 3 Microbiology 3 agronomy 3
genetics & heredity 3 physics 3 plant sciences 3
天文学::天体测量学 3 天文学::天体物理学::实测天体物理学 3 天文学::天文学其他学科 3
物理化学 3 Agriculture 2 Biology 2
Biophysics 2 Chemistry, Organic 2 Energy & Fuels 2
Gastroenterology & Hepatology 2 Integrative & Complementary Medicine 2 Materials Science 2
Metallurgy & Metallurgical Engineering 2 Multidisciplinary Sciences 2 Physics, Condensed Matter 2
Science & Technology - Other Topics 2 Surgery 2 Transplantation 2
horticulture 2 science & technology - other topics 2 图书馆、情报与文献学 2
地球物理勘探 2 工程地质学 2 机械工程 2
机械工程::仪器仪表技术 2 林业 2 民族学 2
海洋地质学 2 物理学::高能物理学 2 生物工程学(生物技术) 2
纳米科技与材料物理::计算材料物理 2 艺术学 2 819.4 Fiber Products;817 Plastics and Other Polymers: Products and Applications;812 Ceramics, Refractories and Glass;741.3 Optical Devices and Systems;741.1.2 Fiber Optics;732.2 Control Instrumentation;731.1 Control Systems;703.1 Electric Networks;601.2 Machine Components 1
Agriculture; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences 1 Astronomy & Astrophysics 1 Astrophysics 1
Biochemical Research Methods 1 Biochemistry & Molecular Biology; Chemistry, Medicinal 1 Biochemistry & Molecular Biology; Plant Sciences 1
Bridges;Strength of Building Materials; Mechanical Properties; Computer Applications;Mathematics; Mathematical Statistics 1 Cell Biology; Developmental Biology; Genetics & Heredity 1 Chemistry & Analysis 1
Chemistry, Analytical 1 Chemistry, Inorganic & Nuclear 1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory;Telephone Systems and Related Technologies; Line Communications;Optical Communication; Numerical Methods;Telecommunication; Radar, Radio and Television;Railway Plant and Structures; Railroad Transportation, General;Railroad Rolling Stock 1
Developmental Biology 1 Energy & Fuels; Engineering 1 Engineering, Environmental 1
Environmental Sciences & Ecology; Marine & Freshwater Biology 1 Environmental Sciences & Ecology; Public, Environmental & Occupational Health 1 Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology 1
Geography, Physical; Geosciences, Multidisciplinary 1 Geology; Agriculture 1 Geology; Agriculture; Water Resources 1
Geosciences, Multidisciplinary 1 Geriatrics & Gerontology; Immunology; Genetics & Heredity; Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Pathology 1 Geriatrics & Gerontology; Surgery; Transplantation; Orthopedics; Anatomy & Morphology 1
Horticulture 1 Infectious Diseases; Pediatrics; Gastroenterology & Hepatology; Virology 1 Life Sciences & Biomedicine - Other Topics 1
Marine & Freshwater Biology 1

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