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火缘 : 42 phrases in 12 subjects |
Automobiles | 5 |
Desert science | 1 |
Earth sciences | 3 |
Electric machinery | 1 |
Environment | 2 |
Hydroelectric power stations | 1 |
Latin | 1 |
Metallurgy | 8 |
Nautical | 2 |
Oil / petroleum | 3 |
Shooting sport | 2 |
Technology | 13 |