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前体物 : 21 phrases in 10 subjects |
| Agriculture | 1 |
| Animal husbandry | 6 |
| Ecology | 1 |
| General | 1 |
| Life sciences | 2 |
| Molecular genetics | 1 |
| Nautical | 1 |
| Polymers | 2 |
| Reproductive biology | 3 |
| Technology | 3 |
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