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写文件 : 20 phrases in 12 subjects |
| Aviation | 2 |
| Business | 3 |
| Economy | 1 |
| Electronics | 3 |
| General | 2 |
| Information technology | 3 |
| International Monetary Fund | 1 |
| International trade | 1 |
| Project management | 1 |
| Space | 1 |
| Technology | 1 |
| Telecommunications | 1 |
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