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环成形 : 27 phrases in 14 subjects |
| Agriculture | 2 |
| Air defense | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| General | 2 |
| Geophysics | 2 |
| Gymnastics | 1 |
| Metallurgy | 1 |
| Nursing | 2 |
| Plastics | 2 |
| Reproductive biology | 1 |
| Surgery | 4 |
| Technology | 6 |
| Textile industry | 1 |
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