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| 31. | hydrogen abstraction reaction |
| 夺氢反应 |
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| 32. | level of abstraction |
| 抽象度;抽象阶段 |
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| 33. | principle of abstraction |
| 抽象原则 |
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| 34. | abstraction of pillars |
| 回采煤柱 |
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| 35. | abstraction of pillar |
| 回采矿柱 |
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| 36. | abstraction of utility |
| 效用抽象 |
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| 37. | data abstraction language |
| 数据抽象语言 |
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| 38. | ABstract thought;abstraction |
| 抽象思维 |
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| 39. | a special abstraction. |
| 一个特别的抽象概念。 |
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| 40. | axiom of abstraction |
| 抽象公理 |
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