Lub thawv ntim yas yog ib qho khoom siv rau khaws cia lossis khaws khoom.Cov thawv ntim khoom kuj feem ntau hu ua cov thawv ntim khoom, ntim cov thawv thiab cov thawv cia.Cov thawv ntim khoom yog ua los ntawm ntau yam ntaub ntawv, feem ntau yog yas, ntaub, ntawv, hlau, ntoo thiab lwm yam.