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| 31. | vertical retort process |
| 竖罐提炼法 |
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| 32. | extraction and metallurgy of thorium |
| 钍的提炼 |
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| 33. | concentrated refinery liquor |
| 浓缩提炼液 |
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| 34. | centrifugal rendering |
| 离心法提炼油脂 |
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| 35. | refine on [upon] one's theory |
| 将自己的理论加以琢磨 [修改] |
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| 36. | You must refine your manners. |
| 你必须使你的举止优雅高尚。 |
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| 37. | refine earlier systems, designs, theories |
| 改良原先的制度、 设计、 理论. |
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| 38. | oil distilling and refining |
| 汽油蒸馏及提炼 |
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| 39. | refine one's manners, taste, language |
| 使举止更优雅、 趣味更高雅、 语言更文雅. |
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| 40. | steam-refined cylinder oil |
| 蒸汽提炼汽缸油 |
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