| 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 | Mycoplasma conjunctivae | 结膜支原体 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 742 | Mesons | 介子 | 32 | 1 | 1 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 42 | | 743 | Mustard Compounds | 芥子化合物 | 8336 | 301 | 451 | 167 | 35 | 24 | 49 | 0 | 0 | 0 | 9363 | | 744 | Mustard Gas | 芥子气 | 263 | 9 | 15 | 19 | 0 | 1 | 0 | 0 | 0 | 0 | 307 | | 745 | Mustard Plant | 芥子植物 | 153 | 2 | 9 | 34 | 0 | 0 | 1 | 0 | 0 | 0 | 199 | | 746 | Metal (TCM) | 金(中医) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 747 | Mesocricetus | 金仓鼠 | 1006 | 51 | 89 | 2 | 10 | 6 | 2 | 0 | 0 | 0 | 1166 | | 748 | Malpighiaceae | 金虎尾科 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 749 | Metals | 金属 | 223219 | 7120 | 14459 | 41058 | 4086 | 1372 | 3034 | 213 | 0 | 541 | 295542 | | 750 | Metals, Alkali | 金属, 碱 | 26526 | 635 | 1450 | 1727 | 84 | 106 | 266 | 15 | 0 | 35 | 30854 | | 751 | Metals, Alkaline Earth | 金属, 碱土 | 38804 | 1346 | 2281 | 4756 | 164 | 262 | 506 | 24 | 0 | 52 | 48203 | | 752 | Metals, Light | 金属, 轻 | 18192 | 1041 | 1439 | 1741 | 216 | 153 | 402 | 41 | 0 | 86 | 23319 | | 753 | Metals, Rare Earth | 金属, 稀土 | 5197 | 295 | 979 | 297 | 77 | 85 | 91 | 3 | 0 | 15 | 7045 | | 754 | Metals, Heavy | 金属, 重 | 134789 | 3662 | 7860 | 30898 | 3066 | 742 | 1408 | 134 | 0 | 308 | 183272 | | 755 | Metallochaperones | 金属伴侣蛋白 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | | 756 | Metalloporphyrins | 金属卟啉类 | 2655 | 176 | 388 | 191 | 7 | 9 | 27 | 0 | 0 | 0 | 3453 | | 757 | Metalloproteases | 金属蛋白酶类 | 15667 | 3145 | 1898 | 198 | 90 | 186 | 59 | 0 | 0 | 0 | 21270 | | 758 | Metalloproteins | 金属蛋白质类 | 10182 | 550 | 777 | 117 | 56 | 50 | 66 | 0 | 0 | 0 | 11798 | | 759 | Metal Nanoparticles | 金属毫微粒 | 12 | 5 | 0 | 3 | 0 | 0 | 1 | 0 | 0 | 0 | 21 | | 760 | Metal Ceramic Alloys | 金属烤瓷合金 | 1825 | 78 | 113 | 16 | 30 | 3 | 5 | 0 | 0 | 0 | 2070 |
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