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

• a natural process resulting in the evolution of organisms best adapted to the environment
  Synonym:survivalsurvival of the fittestselection

双语例句

• A major implication of Darwin and Wallace's theory of natural selection is that all life forms, living and extinct, are descended from a single common ancestor.
  达尔文和华莱士的物竞天择理论都蕴含一个主要的观点：即所有现存和已灭绝的生命形式都起源于同一个共同的祖先。
• Natural selection tends to maintain a mutation rate for maximal evolvability.
  自然选择倾向于保持一个使可进化性最大化的基因突变率。
• 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。
• 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。
• "Natural Selection, entailing Divergence of Character and the Extinction of less-improved forms"( Charles Darwin).
  “自然选择，特性的遗传变异和进化较慢的形式的退化”（查尔斯·达尔文）。
• Natural selection hardly works among the rich and the poor.
  自然选择在穷人和富人之间几乎不起作用。
• 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。
• Living creature adapting to its environment is one of natural selection's results.
  生物对环境的适应，是自然选择的结果之一。
• 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。
• Darwin thinks that natural selection is the chief factor in the development of species.
  达尔文认为自然淘汰是物种发展中的主要因素。