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| 21. | To breed(offspring). |
| 繁殖生育（后代） |
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| 22. | artificial breed rate |
| 人工授精率 |
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| 23. | a genuine breed |
| 纯种 |
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| 24. | improvement of breed |
| 结构改进|品种改进 |
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| 25. | the bulldog breed |
| ((俚))英国人 |
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| 26. | breed-average herdmate |
| 同品种同群牛平均产量 |
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| 27. | pure breed productio |
| 纯种猪繁殖 |
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| 28. | highly selected breed |
| 高度选择品种 |
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| 29. | inter breed crossing |
| 品种杂交 |
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| 30. | Dirt breed disease. |
| 肮脏易生 |
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