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人工 作时 : 23 phrases in 12 subjects |
| Agriculture | 2 |
| Business | 1 |
| Earth sciences | 1 |
| Economy | 6 |
| Electronics | 1 |
| General | 4 |
| Law | 1 |
| Management | 2 |
| Metallurgy | 1 |
| Technology | 2 |
| Telecommunications | 1 |
| United Nations | 1 |
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