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primary emission |
原 发射 : 40 phrases in 14 subjects |
Agriculture | 1 |
Aviation | 3 |
Chemistry | 2 |
Earth sciences | 4 |
Ecology | 1 |
Electronics | 8 |
General | 3 |
Geology | 4 |
Information technology | 2 |
Oil / petroleum | 1 |
Physics | 1 |
Space | 4 |
Technology | 4 |
Water resources | 2 |