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区域 码: 28 phrases in 13 subjects |
Aviation | 4 |
Business | 1 |
Chemistry | 1 |
Earth sciences | 1 |
Electronics | 4 |
General | 1 |
Genetics | 1 |
Geology | 1 |
Information technology | 2 |
Multimedia | 1 |
Rail transport | 1 |
Technology | 5 |
Telecommunications | 5 |