Hauv txheej txheem tshuab cua tshuab zaj duab xis, qhov tsis sib xws ntawm zaj duab xis tuab yog qhov ntsuas tseem ceeb heev.
Qhov tsis sib xws ntawm qhov tuab tuab tuaj yeem tswj tau los ntawm kev ruaj ntseg ntawm kev sib tsoo thiab kev nrawm nrawm, thaum qhov tsis sib xws ntawm qhov tuab tuab ntawm zaj duab xis feem ntau yog nyob ntawm qhov ua tau zoo ntawm kev tuag. , Thiab hloov nrog kev hloov pauv ntawm cov txheej txheem kev tsim khoom. Txhawm rau txhawm rau txhim kho zaj duab xis tuab tsis sib xws hauv kev hloov pauv, ib qho kev siv tsis siv neeg hloov pauv tuab tuab yuav tsum tau qhia. Cov txheej txheem tswj hwm suav nrog tsis siv neeg lub taub hau tuag (cua sov nthuav dav ntsia hlau tswj) thiab lub dav cua tsis siv neeg. Ntawm no peb tsuas yog qhia lub tshuab cua tsis siv neeg. Ntsiab cai thiab daim ntawv thov.
