 |
| 特征量: 26 phrases in 10 subjects |
| Aviation | 1 |
| Computers | 1 |
| Education | 1 |
| Electronics | 1 |
| General | 9 |
| International Monetary Fund | 1 |
| Mathematics | 7 |
| Oil / petroleum | 1 |
| Radio | 1 |
| Technology | 3 |
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