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| 未 研 究: 16 phrases in 12 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Earth sciences | 2 |
| Economy | 1 |
| Electronics | 1 |
| General | 3 |
| International trade | 1 |
| Marketing | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 1 |
| United Nations | 1 |
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