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период |
周期,时期 : 46 phrases in 13 subjects |
Astronautics | 1 |
Automated equipment | 1 |
Business | 1 |
Computers | 1 |
Construction | 1 |
Electronics | 10 |
General | 14 |
Historical | 2 |
Information technology | 1 |
Mathematics | 3 |
Metallurgy | 1 |
Oil processing plants | 1 |
Technology | 9 |