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| 11. | author must be adept in observing social development from which he can bring together related material, refine |
| 作者必须善于观察社会发展,从中发现材料,提炼新的观点,提出新的立意。 |
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| 12. | aromatic hydrocarbon extraction |
| 芳香烃提炼 |
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| 13. | an extractive process |
| 提炼过程 |
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| 14. | petroleum distillation. |
| 石油提炼 |
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| 15. | expenses for refining |
| 提炼费用 |
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| 16. | extractive matter |
| 提炼物 |
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| 17. | production metallurgy |
| 提炼冶金学 |
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| 18. | refinery output |
| 提炼产品产量 |
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| 19. | refinery liquor |
| 提炼液 |
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| 20. | rendering works |
| 提炼工程 |
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