| 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 | | 741 | Orthomolecular Therapy | 正分子疗法 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 742 | Orthognathic Surgical Procedures | 正颌外科手术 | 149 | 8 | 21 | 5 | 3 | 1 | 0 | 0 | 0 | 0 | 187 | | 743 | Orthoreovirus, Mammalian | 正呼肠病毒, 哺乳动物 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | | 744 | Orthoreovirus, Avian | 正呼肠病毒, 禽 | 6 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 11 | | 745 | Orthoreovirus | 正呼肠病毒属 | 20 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 25 | | 746 | Orthodontic Retainers | 正畸保持器 | 21 | 0 | 4 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 27 | | 747 | Orthodontic Appliances | 正畸矫正器 | 3984 | 125 | 475 | 56 | 63 | 40 | 113 | 0 | 0 | 2 | 4858 | | 748 | Orthodontic Appliances, Functional | 正畸矫正器, 功能性 | 551 | 5 | 59 | 5 | 13 | 2 | 0 | 0 | 0 | 1 | 636 | | 749 | Orthodontic Appliance Design | 正畸矫正器设计 | 63 | 2 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 68 | | 750 | Orthodontic Wires | 正畸金属丝 | 1099 | 44 | 143 | 7 | 14 | 12 | 29 | 0 | 0 | 1 | 1349 | | 751 | Orthodontic Space Closure | 正畸缺隙闭合 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | | 752 | Orthodontic Brackets | 正畸托架 | 24 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 25 | | 753 | Orthodontics | 正畸学 | 15271 | 579 | 1622 | 570 | 956 | 199 | 257 | 0 | 0 | 2 | 19461 | | 754 | Orthodontics, Corrective | 正畸学, 矫正 | 9956 | 307 | 1015 | 469 | 277 | 126 | 37 | 0 | 0 | 0 | 12192 | | 755 | Orthodontics, Interceptive | 正畸学, 阻断 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | | 756 | Orthodontic Extrusion | 正畸牙挤出 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | | 757 | Orthodontic Anchorage Procedures | 正畸支持方法 | 169 | 3 | 23 | 1 | 11 | 2 | 0 | 0 | 0 | 0 | 209 | | 758 | Orthogonal Test | 正交试验 | 12994 | 786 | 574 | 8 | 26 | 6 | 1 | 0 | 0 | 0 | 14395 | | 759 | Orthohepadnavirus | 正嗜肝DNA病毒属 | 21601 | 929 | 1221 | 1330 | 89 | 182 | 90 | 0 | 0 | 0 | 25444 | | 760 | Orthomyxoviridae | 正粘病毒科 | 7683 | 355 | 376 | 2244 | 26 | 36 | 95 | 9 | 0 | 13 | 10864 |
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