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| 系统选择; 系统选项 | |||
| system option: 13 phrases in 8 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Electronics | 2 |
| Finances | 2 |
| Information technology | 1 |
| Securities | 4 |
| Technology | 1 |
| United Nations | 1 |
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