手 动控制 : 66 phrases in 21 subjects |
Agriculture | 1 |
Air defense | 2 |
Automobiles | 5 |
Aviation | 7 |
Business | 1 |
Chemistry | 1 |
Communications | 1 |
Earth sciences | 1 |
Electric machinery | 2 |
Electronics | 7 |
Engineering geology | 1 |
Geophysics | 1 |
Hydroelectric power stations | 1 |
Metallurgy | 2 |
Navigation | 1 |
Oil processing plants | 1 |
Shipbuilding | 1 |
Space | 5 |
Technology | 23 |
Telecommunications | 1 |
United Nations | 1 |