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强制循环: 91 phrases in 15 subjects |
Automobiles | 4 |
Chemistry | 3 |
Compressors | 1 |
Electric machinery | 4 |
Electricity | 2 |
Electronics | 21 |
Hydroelectric power stations | 1 |
Metallurgy | 7 |
Nautical | 6 |
Oil / petroleum | 1 |
Plastics | 4 |
Refrigeration | 5 |
Shipbuilding | 3 |
Technology | 27 |
Wind Energy | 2 |