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| areal structure | |||
| regional structure | |||
| formation of country; zonal structure | |||
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区域构造 : 35 phrases in 6 subjects |
| Earth sciences | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 13 |
| Technology | 17 |
| United Nations | 1 |
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