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41. | refinement of crystal structure |
| 晶体结构的精化 |
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42. | extraction and metallurgy of thorium |
| 钍的提炼 |
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43. | concentrated refinery liquor |
| 浓缩提炼液 |
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44. | refinement of tariff classifications |
| 税则的精细分类 |
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45. | a man of refinement. |
| 言谈举止文雅的男子。 |
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46. | fixed local grid refinement |
| 固定局部网格加密 |
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47. | donnish refinement of speech; |
| 学究式的雅语; |
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48. | a refinement of logic |
| 逻辑的精细 (之点) |
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49. | model development and refinement |
| 模型建立与改进 |
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50. | dynamic local grid refinement |
| 动态局部网格加密 |
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