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41. | finite group |
| 有限群 |
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42. | The determinative characteristics of common rock forming minerals containing quartz group, feldspar group |
| 对常见造岩矿物,如石英类、长石类、云母类、角闪石类、辉石类、橄榄石类、碳酸盐类矿物的鉴定特征将予以详细的说明。 |
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43. | permutation group |
| 置换群 |
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44. | Munda group |
| 蒙(扪)达语族 |
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45. | quotient group |
| 商群 |
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46. | coliform group |
| 大肠菌群 |
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47. | methyl group |
| 甲基 |
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48. | small group |
| 小群体 |
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49. | Chadic group |
| 乍得语族 |
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50. | group instruction |
| 分组教学 |
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