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变坡度 : 24 phrases in 8 subjects |
| Architecture | 1 |
| Bridge construction | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Securities | 1 |
| Technology | 15 |
| United Nations | 3 |
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