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| 11. | Some creatures were better at surviving and reproducing themselves than others. |
| 有些生物的生存与繁殖后代的能力比其他生物强。 |
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| 12. | Some fish migrate to this section of water to breed. |
| 一些鱼类回游到此水段来繁殖后代。 |
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| 13. | Producing offspring of only one sex, as some species of aphids. |
| 单性繁殖后代的，如蚜虫的某些种类 |
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| 14. | Direct descent from a particular ancestor; ancestry. |
| 直系后代某祖先的直系后代；后代 |
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| 15. | Humans can not only reproduce themselves but also produce the necessities of life. |
| 人类不但能繁殖后代，还能创造生活的必需品。 |
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| 16. | In recent years, particularly in the U.S., much importance has been placed on the right of individuals to reproduce in ways that they wish. |
| 近年来，尤其在美国，人们非常重视个人按自己意图繁殖后代的权利。 |
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| 17. | Reproduction provides new generations and makes possible the continuation of race. |
| 繁殖产生新的后代，从而使种族得以延续。 |
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| 18. | From thoseworms were descended all the silk-producing caterpillars inEurope down to modern times. |
| 直到当代，欧洲所有生产蚕丝的蚕都是那些蚕繁殖的后代。 |
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| 19. | To bear an overabundance of fruit or offspring. |
| 结实过多，繁殖过度拥有过多的果实或后代 |
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| 20. | future generations [ ages ] |
| 后代 |
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