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误差指示 : 36 phrases in 14 subjects |
| Air defense | 1 |
| Automobiles | 3 |
| Aviation | 1 |
| Business | 1 |
| Construction | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Economy | 1 |
| Electronics | 2 |
| General | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Space | 7 |
| Technology | 12 |
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