They isolated the importance of temperature by studying only female beak length and comparing species with similar diets living in different climates.
为了将温度的重要性孤立来看，他们只研究雌鸟的喙长，并将生活在不同气候但拥有相似食性的鸟类进行对比。
They isolated the importance of temperature by studying only female beak length and comparing species with similar diets living in different climates.
为了将温度的重要性孤立来看，他们只研究雌鸟的喙长，并将生活在不同气候但拥有相似食性的鸟类进行对比。
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