像斯密改善产品设计论一样，这些进化已经不再使单个的老鹰具有相对优势，但它们的最终结果却使得老鹰作为一个物种而变得更有生命力。
Like Smith's product design improvements, these mutations no longer confer relative advantage to individual hawks, but their ultimate effect was to make hawks more effective as a species.
像斯密改善产品设计论一样，这些进化已经不再使单个的老鹰具有相对优势，但它们的最终结果却使得老鹰作为一个物种而变得更有生命力。
Like Smith's product design improvements, these mutations no longer confer relative advantage to individual hawks, but their ultimate effect was to make hawks more effective as a species.
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