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经试验的 : 31 phrases in 12 subjects |
| Architecture | 1 |
| Automobiles | 6 |
| Aviation | 2 |
| Business | 1 |
| Economy | 1 |
| General | 7 |
| Hydroelectric power stations | 1 |
| Management | 1 |
| Metallurgy | 6 |
| Nautical | 1 |
| Space | 2 |
| Technology | 2 |
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