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不可预测 : 17 phrases in 9 subjects |
| Agriculture | 2 |
| Aviation | 1 |
| Business | 3 |
| Climatology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 1 |
| Securities | 2 |
| Technology | 5 |
| Telecommunications | 1 |
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