Thaum lub sij hawm tsim cov txheej txheem ntawm cov roj vaj huam sib luag zaub, kev ua tau zoo ntawm cov khoom lim ncaj qha afiects qhov zoo thiab tawm los ol tiav cov khoom.Tshwj xeeb tshaj yog nyob rau hauv high tiam kab, qhov teeb meem ntawm cov khoom lim yuav ua rau cov khoom loj ntawm seem thiab poob.Kinda lim muab cov neeg siv khoom nrog cov khoom ruaj khov thiab txhim khu kev qha raws li qhov yuav tsum tau ua ntawm txhua tus txheej txheem, tshuaj xyuas thiab daws cov teeb meem hauv txhua tus txheej txheem, ua kom cov khoom zoo thiab txo tus nqi.
