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阶数 : 106 phrases in 11 subjects |
| Astronautics | 1 |
| Aviation | 1 |
| Electronics | 7 |
| General | 40 |
| Information technology | 7 |
| International Monetary Fund | 1 |
| Mathematics | 19 |
| Military | 1 |
| Nanotechnology | 1 |
| Nautical | 1 |
| Technology | 27 |
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