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交换 级 : 42 phrases in 13 subjects |
| Aviation | 3 |
| Chemistry | 1 |
| Computer networks | 1 |
| Electronics | 11 |
| General | 1 |
| Information technology | 4 |
| Multimedia | 1 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Securities | 1 |
| Space | 1 |
| Technology | 6 |
| Telecommunications | 10 |
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