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1. Oxford Dictionary

   natural selection

   • IPA[ˌnatʃ(ə)rəl sɪˈlɛkʃn]

   英式

   • n.
     the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.

   • noun: natural selection

2. • 更多解釋

   natural selection

   • IPA[ˌnaCHər(ə)l səˈlekSH(ə)n]

   美式

   • n.
     the process whereby organisms better adapted to their environment tend to survive and produce ...

   Oxford American Dictionary