Cov ntawv tawg yog ib hom khoom nrog nws tus kheej laser lus yooj yim, nws muaj cov yam ntxwv nplaum uas nws tsis tuaj yeem siv dua thiab tsis tuaj yeem siv dua tom qab dhau los. Piv nrog daim ntawv dog dig, nws muaj cov ntawv tsis zoo; Tom qab luam ntawv thiab tuag-txiav, cov npoo yuav ua rau hauv cov ntaub ntawv tsis txaus siab suav nrog cov ntaub ntawv sau tsis pub lwm tus paub lossis cov kev xav tau ntawm daim ntawv tsis txaus ntseeg, peb muaj peev xwm kuj muab ntau cov khoom nplaum, suav nrog daim ntawv nplaum, cov ntawv tsiaj, cov ntawv sau hluavtaws, cov khaub ncaws cov khaub ncaws, ntim khoom thiab lwm yam Cov khoom siv raw.welwerness mus txuas ntxiv nrog kuv.