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齿环 : 71 phrases in 17 subjects |
Agriculture | 4 |
Air defense | 1 |
Architecture | 1 |
Automobiles | 2 |
Biology | 1 |
Bridge construction | 1 |
Construction | 2 |
Dentistry | 1 |
Drilling | 2 |
Figure skating | 1 |
Latin | 2 |
Mechanics | 1 |
Metallurgy | 2 |
Nautical | 1 |
Space | 2 |
Technology | 46 |
Wind Energy | 1 |