So the first step in biological evolution, the evolution of DNA -- actually it was RNA came first -- took billions of years, but then evolution used that information-processing backbone to bring on the next stage.
生物进化的第一步， DNA的进化 -- 其实是先有的RNA -- 用了几十亿年， 但是以后的进化过程是用这个信息处理支柱 来促使下一个层次。