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初始 期 : 17 phrases in 10 subjects |
| Desert science | 1 |
| Electronics | 2 |
| Engineering geology | 1 |
| Finances | 1 |
| Information technology | 2 |
| Metallurgy | 1 |
| Nautical | 1 |
| Project management | 1 |
| Space | 1 |
| Technology | 6 |
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