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| 原地面 | |||
| 原始地面; 天然地面 | |||
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original ground : 12 phrases in 7 subjects |
| Desert science | 1 |
| Earth sciences | 2 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geology | 1 |
| Hydroelectric power stations | 2 |
| Technology | 4 |
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