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模拟源 : 34 phrases in 12 subjects |
| Air defense | 2 |
| Aviation | 1 |
| Earth sciences | 3 |
| Ecology | 1 |
| Economy | 1 |
| Electronics | 7 |
| Geology | 1 |
| Information technology | 3 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 7 |
| Water resources | 5 |
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