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| sure factor | |||
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确定因素 : 15 phrases in 9 subjects |
| Business | 3 |
| Chemistry | 1 |
| China | 1 |
| Economy | 2 |
| Explosives and Explosive Ordnance Disposal | 4 |
| General | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |
| Water resources | 1 |
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