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| conditional OR | |||
| 条件“或: 18 phrases in 13 subjects |
| Architecture | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Business | 2 |
| Commerce | 1 |
| Earth sciences | 1 |
| Economy | 1 |
| Electronics | 2 |
| General | 2 |
| International trade | 2 |
| Project management | 1 |
| Technology | 1 |
| United Nations | 2 |
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