Ua ntej tshaj plaws, siv cov thawv noj su uas siv tau pov tseg tuaj yeem txuag lub sijhawm vim tias tsis tas yuav ntxuav lawv tom qab siv, uas yooj yim heev rau cov neeg tsis khoom.
Qhov thib ob, cov thawv noj su uas siv tau pov tseg tuaj yeem ua kom muaj kev nyiam huv thiab kev nyab xeeb, vim tias siv cov thawv noj su uas siv tau pov tseg tuaj yeem zam qhov tsis zoo ntawm kev siv cov tais diav rau pej xeem, uas yog qhov tseem ceeb heev rau kev tiv thaiv kev sib kis thiab kis kab mob.
Tsis tas li ntawd, cov thawv ntim khoom noj uas siv tau pov tseg kuj tseem muaj txiaj ntsig zoo rau kev tswj xyuas cov khoom noj kom zoo thiab kev noj qab haus huv, vim tias cov khoom siv ntawm cov khoom noj khoom haus pov tseg muaj zog thiab tuaj yeem ua kom cov khoom noj tshiab thiab dej tsis zoo.
Thaum kawg, siv cov thawv noj su uas siv tau pov tseg kuj yooj yim vim lawv hnav thiab nqa tau yooj yim, ua rau lawv zoo tagnrho rau kev siv thaum mus ncig, noj mov sab nraum zoov, thiab lwm yam dej num. Yog li ntawd, siv cov thawv ntim khoom noj uas siv tau pov tseg yog qhov ua tau zoo, txuag lub sijhawm, kev nyiam huv thiab kev nyab xeeb, uas yooj yim dua thiab sai dua.
