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NASA | |
multimed. | 国家航空和航天局 |
world-wide communication network | |
tech. | 世界交通图 |
NASA world-wide communications network : 140 phrases in 9 subjects |
Air defense | 3 |
Aviation | 24 |
Earth sciences | 8 |
Electronics | 13 |
General | 3 |
Otorhinolaryngology | 1 |
Space | 23 |
Telecommunications | 1 |
United States | 64 |