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宇宙 线 : 133 phrases in 16 subjects |
Agriculture | 1 |
Air defense | 1 |
Astronomy | 2 |
Aviation | 5 |
Earth sciences | 5 |
Electronics | 7 |
General | 9 |
Geophysics | 1 |
Information technology | 1 |
Metallurgy | 1 |
Nautical | 2 |
Oil / petroleum | 2 |
Space | 69 |
Technology | 25 |
Telecommunications | 1 |
United States | 1 |