挑句子吧

　　Survivalofthefittest"isaphrasewhichisshorthandforaconceptrelatingtocompetitionforsurvivalorpredominance.OriginallyappliedbyHerbertSpencerinhisPrinciplesofBiologyof1864,SpencerdrewparallelstohisideasofeconomicswithCharlesDarwin'stheoriesofevolutionbywhatDarwintermednaturalselection.

　　AlthoughDarwinusedthephrase"survivalofthefittest"asasynonymfor"naturalselection",itisametaphor,notascientificdescription.Itisnotgenerallyusedbymodernbiologists,whousethephrase"naturalselection"almostexclusively.

　　Aninterpretationofthephrasetomean"onlythefittestorganismswillprevail"(aviewcommoninsocialDarwinism)isnotconsistentwiththeactualtheoryofevolution.Anyorganismwhichiscapableofreproducingitselfonanongoingbasiswillsurviveasaspecies,notjustthe"fittest"ones.Amoreaccuratecharacterizationofevolutionwouldbe"survivalofthefitenough",althoughthisissometimesregardedasatautology.