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时间检查 : 16 phrases in 10 subjects |
| Aviation | 4 |
| Business | 2 |
| Electronics | 2 |
| Finances | 1 |
| General | 1 |
| Information technology | 1 |
| Reliability | 1 |
| Space | 2 |
| Technology | 1 |
| United Nations | 1 |
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