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| trace table | |||
| 跟 踪表: 16 phrases in 8 subjects |
| Artificial intelligence | 1 |
| Aviation | 4 |
| Electronics | 3 |
| Information technology | 2 |
| Missiles | 1 |
| Oil / petroleum | 1 |
| Securities | 2 |
| Space | 2 |
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