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| 21. | Some animals will not breed when kept in cages. |
| 有些动物关在笼子里就不会繁殖。 |
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| 22. | Bacteria will not breed in alcohol. |
| 细菌不能在酒精内繁殖。 |
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| 23. | Wild animals don't breed well in captivity. |
| 圈着的动物繁殖不好. |
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| 24. | Frogs will usually breed in any convenient pond. |
| 青蛙在任何条件适宜的池塘里都能繁殖。 |
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| 25. | breeding ground:a place where animals breed. |
| 滋生地,繁殖地:动物繁殖的地方。 |
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| 26. | Some animals don't breed well in captivity. |
| 有些动物在牢笼中，繁殖的不好。 |
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| 27. | all species will Breed inter se. |
| 所有的生物都在其种内进行繁殖。 |
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| 28. | These farmers try to breed bigger sheep. |
| 这些农人在设法繁殖较大品种的绵羊。 |
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| 29. | A place where herons nest and breed. |
| 鹭群栖息繁殖处，鹭巢群 |
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| 30. | They need a humid, dark environment to breed. |
| 它们需要一个潮湿、阴暗的环境来繁殖 |
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