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球缺 : 21 phrases in 10 subjects |
| Automobiles | 3 |
| Business | 1 |
| Dermatology | 1 |
| General | 3 |
| Genetics | 3 |
| Metallurgy | 1 |
| Nursing | 3 |
| Surgery | 1 |
| Technology | 3 |
| Veterinary medicine | 2 |
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