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控制区 : 344 phrases in 39 subjects |
Agriculture | 4 |
Air defense | 8 |
Automobiles | 11 |
Aviation | 59 |
Business | 2 |
Chemistry | 1 |
China | 3 |
Climatology | 1 |
Communications | 1 |
Computers | 1 |
Cryptography | 1 |
Earth sciences | 11 |
Ecology | 3 |
Economy | 1 |
Electronics | 65 |
Environment | 4 |
Explosives and Explosive Ordnance Disposal | 4 |
Finances | 1 |
General | 5 |
Genetics | 6 |
Hydroelectric power stations | 2 |
Information technology | 13 |
Logistics | 2 |
Metallurgy | 9 |
Multimedia | 1 |
Nautical | 5 |
Navigation | 2 |
Nuclear and fusion power | 1 |
Oil / petroleum | 1 |
Oil processing plants | 1 |
Project management | 1 |
Rail transport | 2 |
Refrigeration | 10 |
Space | 21 |
Technology | 71 |
Telecommunications | 3 |
United Nations | 2 |
United States | 2 |
Water resources | 3 |