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行进 时间 : 16 phrases in 13 subjects |
Air defense | 1 |
Automobiles | 1 |
Aviation | 1 |
Basketball | 1 |
Commerce | 1 |
Corporate governance | 1 |
Electronics | 1 |
General | 2 |
Hydroelectric power stations | 1 |
Metallurgy | 1 |
Military | 1 |
Nanotechnology | 1 |
Technology | 3 |