视距 : 169 phrases in 19 subjects |
Astronautics | 2 |
Astronomy | 1 |
Aviation | 8 |
Cartography | 8 |
Ecology | 1 |
Electronics | 4 |
General | 43 |
Geology | 2 |
Medical | 2 |
Military | 17 |
Nautical | 3 |
Oil and gas | 5 |
Oil processing plants | 2 |
Photography | 1 |
Radio | 2 |
Road works | 1 |
Space | 1 |
Surveying | 1 |
Technology | 65 |