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不 稳定的 : 73 phrases in 12 subjects |
| Astronautics | 1 |
| Automated equipment | 1 |
| Aviation | 3 |
| Business | 5 |
| Economy | 1 |
| Education | 1 |
| Electronics | 2 |
| General | 25 |
| Nanotechnology | 1 |
| Nautical | 2 |
| Oceanography & oceanology | 1 |
| Technology | 30 |
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