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| 31. | shake the earth away |
| 抖掉泥土 |
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| 32. | drainage allowance |
| 液汁流失减重 |
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| 33. | Earth or soil. |
| 泥土；土壤 |
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| 34. | a layer of clay |
| 一层泥土 |
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| 35. | a spadeful of earth |
| 一锹泥土 |
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| 36. | a clod of earth |
| 一块泥土 |
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| 37. | a mass of clay |
| 一堆泥土 |
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| 38. | universal soil loss equatio |
| 通用土壤流失方程式 |
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| 39. | riddle soil |
| 筛泥土 |
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| 40. | stem drain of state assets |
| 防止(堵塞)国有资产流失 |
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