单词	punctuated equilibrium
释义	punctuated equilibrium noun : evolution that is characterized by long periods of stability in the characteristics of an organism and short periods of rapid change during which new forms appear especially from small subpopulations of the ancestral form in restricted parts of its geographic range also : a theory or model of evolution emphasizing this compare gradualism sense 2 Example Sentences Recent Examples on the Web The idea, called punctuated equilibrium, was originally developed by paleontologists to explain patterns in the emergence and diversification of new species, which sometimes seems to happen in sudden bursts of activity after eons of stability. Kiona N. Smith, Ars Technica, 20 Sep. 2019 Word History First Known Use 1972, in the meaning defined above
随便看	trips the light fantastic trips up tripsacoid Tripsacum tripses tripsill tript triptan triptane triptanes tripteral tripton triptote triptotes triptycas triptych triptychs triptyque triptyques tripudiated tripudiates tripudiating tripudiations tripudiums tripuhyite

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