Xaiv qhov ntsuas pom tseeb yog qhov tseem ceeb rau kev ua tiav cov txheej txheem xav tau. Tsis muaj tseeb - cov ntxaij lim dej tau lees paub qhov kev tshem tawm cov khoom ntawm lossis siab dua qhov micron qhov loj me, ua rau lawv zoo tagnrho rau cov ntawv thov tseem ceeb uas yuav tsum tau ua kom huv huv. Nominal - cov ntxaij lim dej, ntawm qhov tod tes, muab qhov feem pua -raws li kev ntes tau zoo thiab feem ntau siv rau hauv dav dav - lub hom phiaj kev lag luam pom qhov twg tus nqi - kev ua tau zoo yog qhov tseem ceeb.
