单词	free-living
释义	free-living adjective free-liv·​ing ˈfrē-ˈli-viŋ  1 : marked by more than usual freedom in the gratification of appetites 2 a : not fixed to the substrate but capable of motility a free-living protozoan b : being metabolically independent : neither parasitic nor symbiotic a free-living adult hairworm Word History First Known Use 1818, in the meaning defined at sense 1 Medical Definition free-living adjective free-liv·​ing ˈfrē-ˈliv-iŋ  1 : not fixed to the substrate but capable of motility a free-living protozoan 2 : being metabolically independent : neither parasitic nor symbiotic
随便看	crack arrester crack baby crack cocaine crack down crack down (on) crack down on crack house crack into crack on crack shot crack the whip crack willow crack wise crack-loo crack-up crack-ups crackable crackajack crackajacks crackaloo crackback crackbacks crackbrain crackbrained crackbrains

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