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正反射 : 32 phrases in 10 subjects |
Automobiles | 2 |
Aviation | 1 |
Electronics | 4 |
Explosives and Explosive Ordnance Disposal | 1 |
Oil / petroleum | 1 |
Otorhinolaryngology | 2 |
Plastics | 2 |
Sports | 9 |
Technology | 9 |
Water polo | 1 |