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字母符 : 30 phrases in 13 subjects |
| Advertising | 2 |
| Agriculture | 1 |
| Air defense | 1 |
| Aviation | 2 |
| Electronics | 1 |
| General | 8 |
| Genetics | 1 |
| Information technology | 3 |
| Metallurgy | 2 |
| Multimedia | 1 |
| Project management | 1 |
| Space | 2 |
| Technology | 5 |
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