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中键 : 31 phrases in 12 subjects |
| Animal husbandry | 1 |
| Aviation | 2 |
| Chemistry | 2 |
| Electronics | 5 |
| General | 1 |
| Information technology | 3 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Project management | 3 |
| Space | 2 |
| Technology | 7 |
| Telecommunications | 3 |
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