名词
中文翻译：向下繁殖
同义词：
['down-breeding', 'down-breeding species', 'descendants']
例句：
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1. Down breeding is a process where offspring are selected based on their ability to survive and reproduce in harsh conditions.
向下繁殖是一种过程，其中后代被选择，基于它们在恶劣条件下生存和繁殖的能力。
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2. In some species, down-breeding can lead to the loss of genetic diversity, which could bedetrimental to the survival of the population.
在某些物种中，向下繁殖可能导致遗传多样性的丧失，这对种群的生存可能是有害的。
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3. The down-breeding process has been observed in many animal species, including humans, where certain traits are favored over others.
许多动物物种都观察到了向下繁殖的过程，包括人类，其中某些特征比其他特征更受青睐。