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главная последовательность (звёзд) |
主 序 : 63 phrases in 12 subjects |
Antennas and waveguides | 1 |
Astronomy | 7 |
Education | 1 |
Electronics | 1 |
General | 26 |
Information technology | 7 |
Law | 4 |
Mathematics | 2 |
Medical | 1 |
Nautical | 1 |
Oil processing plants | 2 |
Technology | 10 |