![]() |
可 见度 : 111 phrases in 19 subjects |
Air defense | 13 |
Automobiles | 5 |
Aviation | 4 |
Chemistry | 2 |
Ecology | 1 |
Electronics | 5 |
Explosives and Explosive Ordnance Disposal | 1 |
Finances | 1 |
General | 1 |
Geophysics | 1 |
Lighting other than cinema | 1 |
Metallurgy | 2 |
Nautical | 1 |
Oil / petroleum | 4 |
Radio | 1 |
Remote sensing | 1 |
Space | 8 |
Technology | 54 |
Water resources | 5 |