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| 互相交 换: 19 phrases in 12 subjects |
| Agriculture | 2 |
| Aviation | 1 |
| Chemistry | 1 |
| Economy | 1 |
| Electronics | 3 |
| General | 1 |
| Mathematics | 1 |
| Metallurgy | 1 |
| Project management | 1 |
| Shipbuilding | 1 |
| Sports | 2 |
| Technology | 4 |
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