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51. | geotectonic system |
| 大地构造体系 |
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52. | Yalta System |
| 雅尔塔体系 |
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53. | knowledge hierarchy |
| 知识体系 |
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54. | development framework |
| 发展体系 |
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55. | chain store system |
| 连锁商店体系 |
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56. | national tax system |
| 国税体系 |
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57. | depositional system |
| 沉积体系 |
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58. | grouping system |
| 分组体系 |
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59. | Harmonized Central American System |
| 中美洲体系 |
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60. | carbonate system |
| 碳酸盐体系 |
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