高清 晰度 : 80 phrases in 15 subjects |
Agriculture | 1 |
Air defense | 2 |
Automobiles | 2 |
Business | 1 |
Earth sciences | 3 |
Electronics | 39 |
General | 2 |
Geophysics | 1 |
Information technology | 3 |
Multimedia | 2 |
Nautical | 1 |
Shipbuilding | 4 |
Space | 7 |
Technology | 7 |
Telecommunications | 5 |