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natural selection

英 [ˌnætʃrəl sɪˈlekʃn]

美 [ˌnætʃrəl sɪˈlekʃn]

n.  自然选择; 物竞天择

医学

牛津词典

    noun

    • 自然选择;物竞天择
      the process by which plants, animals, etc. that can adapt to their environment survive and reproduce, while the others disappear

      柯林斯词典

      • N-UNCOUNT (生物的)自然选择,物竞天择,适者生存
        Natural selectionis a process by which species of animals and plants that are best adapted to their environment survive and reproduce, while those that are less well adapted die out.
        1. Natural selection ensures only the fittest survive to pass their genes on to the next generation.
          自然选择确保只有最适应环境的物种得以存活下来,把基因传给下一代。

      英英释义

      noun

      双语例句

      • Again, differences between people and the opportunity for natural selection to take advantage of it have diminished.
        人与人之间的差异和利用差异进行自然选择的机会再一次失去。
      • Viruses have genes, can reproduce and are subject to the evolutionary pressures imposed by natural selection.
        病毒有基因,能再生,需要应对自然选择的进化压力。
      • Financial history is essentially the result of institutional mutation and natural selection.
        金融史实质上就是制度突变和自然选择的结果。
      • Whether speciation is achieved normally via genetic drift or natural selection is the subject of much ongoing discussion.
        究竟正常的物种形成是通过遗传漂变还是通过自然选择达到的,是现在正在进行热烈讨论的话题。
      • Variation within a species is the raw material upon which natural selection acts.
        物种内部的变异是自然选择起作用的原始的生理现象。
      • ANTIBIOTIC drugs are a well-known test of the idea of natural selection.
        抗生素是对自然选择学说一个十分知名的论证。
      • In this case, natural selection would tend to add to the stature of the plant.
        在此种情况下,自然选择就有增加植物高度的倾向。
      • Mutation and speciation have usually been evolved responses to the environment and competition, with natural selection determining which new traits become widely disseminated.
        通常,突变和物种形成的进化,取决于环境和竞争来,哪些新特性普遍传播则取决于自然选择。
      • A theory of organic evolution claiming that new species arise and are perpetuated by natural selection.
        主张新品种在自然中物竞天择的有机进化论。
      • Natural selection is a slower process with man than with any other creature.
        自然选择对人类比起对其他生物是个较为缓慢的过程。