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satellite-to-satellite tracking |
卫星- 卫星跟踪 : 137 phrases in 13 subjects |
Air defense | 3 |
Astronautics | 1 |
Aviation | 13 |
Business | 1 |
Cartography | 2 |
Earth sciences | 5 |
Electronics | 20 |
General | 4 |
Geophysics | 2 |
Information technology | 1 |
Space | 58 |
Technology | 23 |
United States | 4 |