Lub hom phiaj ntawm kev ua haujlwm zoo, cov cuab yeej ua haujlwm siab precision, yuav tsum muaj cov thev naus laus zis zoo, cov cuab yeej paub tab, cov txheej txheem nruj txhua radcrossing, siv cov khoom siv txawv teb, ua kom ruaj khov zoo, txij nkawm tus nqi qis heev, txhawm rau nrhiav cov khoom lag luam thawj zaug los tiv thaiv cov khoom lag luam. kev sib tw ua lag luam hnyav.
