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因子 系统 : 14 phrases in 10 subjects |
| Agriculture | 3 |
| Air defense | 1 |
| Electronics | 1 |
| Genetics | 1 |
| Geophysics | 1 |
| Molecular genetics | 2 |
| Plastic surgery | 1 |
| Space | 1 |
| Technology | 2 |
| Water resources | 1 |
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