| 序号 | 英文主题词 | 中文主题词 | 命中文献数量（篇） |
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| 期刊 | 博硕士论文 | 会议论文 | 报纸 | 年鉴 | 成果 | 专利 | 国家标准 | 行业标准 | 标准 | 总计 | | 2181 | 2,3-Diphosphoglycerate | 2,3-二磷酸甘油酸盐 | 87 | 4 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 94 | | 2182 | 2,3-Diketogulonic Acid | 2,3-二酮古洛糖酸 | 70 | 5 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 77 | | 2183 | 2',3'-Cyclic-Nucleotide Phosphodiesterases | 2',3'-环核苷酸磷酸二酯酶类 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | | 2184 | 2,4,5-Trichlorophenoxyacetic Acid | 2,4,5-三氯苯氧乙酸 | 6 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | | 2185 | 2,4-Dichlorophenoxyacetic Acid | 2,4-二氯苯氧乙酸 | 183 | 12 | 21 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 217 | | 2186 | 2,4-Dinitrophenol | 2,4-二硝基苯酚 | 88 | 11 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 106 | | 2187 | 2,5-Dimethoxy-4-Methylamphetamine | 2,5-二甲氧-4-甲基苯丙胺 | 182 | 15 | 30 | 17 | 0 | 2 | 0 | 0 | 0 | 0 | 246 | | 2188 | 2',5'-Oligoadenylate Synthetase | 2',5'-寡腺苷酸合成酶 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | | 2189 | 2,6-Dichloroindophenol | 2,6-二氯靛酚 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | | 2190 | 20(s)-Protopanaxadiol | 20(S)-原人参二醇 | 111 | 18 | 13 | 1 | 0 | 1 | 16 | 0 | 0 | 0 | 160 | | 2191 | 20-Hydroxysteroid Dehydrogenases | 20-羟甾类脱氢酶类 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 2192 | 24,25-Dihydroxyvitamin D 3 | 24,25-二羟维生素D3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 2193 | 25-Hydroxyvitamin D3 1-alpha-Hydroxylase | 25-羟化维生素D3 1-α-羟化酶 | 5 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | | 2194 | 25-Hydroxyvitamin D 2 | 25-羟维生素D2 | 6 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | | 2195 | 2S Albumins, Plant | 2S白蛋白, 植物 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 2196 | 2-Propanol | 2-丙醇 | 996 | 25 | 38 | 7 | 2 | 0 | 1 | 1 | 0 | 2 | 1072 | | 2197 | 2-Methyl-4-chlorophenoxyacetic Acid | 2-甲基-4-氯苯氧乙酸 | 34 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 36 | | 2198 | 2-Chloroadenosine | 2-氯腺苷 | 48 | 1 | 0 | 3 | 0 | 0 | 6 | 0 | 0 | 0 | 58 | | 2199 | Ethylene Chlorohydrin | 2-氯乙醇 | 88 | 0 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 3 | 94 | | 2200 | 2-Naphthylamine | 2-萘胺 | 38 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 39 |
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