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主要区域 : 11 phrases in 9 subjects |
| Aviation | 1 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Genetics | 1 |
| Hydroelectric power stations | 1 |
| Multimedia | 1 |
| Securities | 2 |
| Technology | 2 |
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