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通 导 的 : 24 phrases in 10 subjects |
| Astronautics | 1 |
| Aviation | 2 |
| Electronics | 3 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Finances | 1 |
| Hydroelectric power stations | 1 |
| Project management | 3 |
| Space | 7 |
| Technology | 3 |
| United Nations | 1 |
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