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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 |