"物竞天择"是个多义词，它可以指物竞天择（达尔文进化论的核心思想）,物竞天择（个人信息）,物竞天择（汉语词语）,物竞天择（同名游戏）,物竞天择（金城出版社出版图书）。
物竞天择确保只有最适应环境的物种才得以生存下来，把基因传递给下一代。
Natural selection ensures only the fittest survive to pass their genes on to the next generation.
达尔文所理解的也就是自然选择，物竞天择。
All Darwin perceived was that selection must work in nature, too.
经过数千年的物竞天择，这些特征延续至今。
Through natural selection over thousands of years, these characteristics continue to the present day.
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