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31. | displacement activity |
| 替代活动 |
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32. | activity vector |
| 活动向量 |
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33. | double activity |
| 双重活动性;双重活度 |
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34. | maritime activity |
| 海事活动 |
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35. | liquefying activity |
| 液化力 |
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36. | fermentation activity |
| 发酵活性 |
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37. | linear activity |
| 线性放射性 |
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38. | delayed activity |
| 缓发放射性 |
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39. | feeding activity |
| 摄食活力 |
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40. | meteor activity |
| 流星状活动 |
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