1. 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。
2. English natural scientist whose `On the Origin of Species' formulated a theory of evolution by natural selection (1809-1882). 
   英国博物学家（1809-1882），他的《生物起源论》阐明了自然选择的进化论学说。
3. The theory, based on Lamarckism, that response to environmental influence can be inherited and transmitted through the action of natural selection. 
   新拉马克主义以拉马克主义为基础的理论，认为环境影响的结果会通过大自然的选择遗留和传递下来
4. The theory that the evolution of a species is influenced most strongly by internal factors and is not subject to the external forces of natural selection. 
   直向进化论关于物种的进化是受内部因素的强烈影响而非外部自然选择的影响的理论
5. The theory that groups of organisms change with passage of time, mainly as a result of natural selection, so that descendants differ morphologically and physiologically from their ancestors. 
   进化论主要由于自然选择的结果，生物体群经历了阶段性的变化，使后代在形态和生理上都与它们的祖先有所不同的理论

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• 1. 选择学说
  {n.}选择定理 selection theory...选择学说 selection time...{n.}选择时间 selection tracing
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