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relative time : 23 phrases in 10 subjects |
| Business | 1 |
| China | 1 |
| Commerce | 1 |
| Electronics | 4 |
| Geology | 1 |
| Oil / petroleum | 1 |
| Power system protection | 1 |
| Space | 3 |
| Technology | 9 |
| Telecommunications | 1 |
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