Qhov hluav taws kub qhov rooj xauv yog ib qho tseem ceeb ntawm lub qhov rooj hluav taws, thiab qhov hluav taws kub qhov rooj xauv tsis tuaj yeem qhib tau yooj yim. Lub qhov rooj hluav taws kub sib txawv ntawm qhov rooj xauv qhov rooj. Hluav taws qhov rooj xauv yog txuas nrog lub tshuab ntse. Yog tias muaj xwm txheej tshwm sim, qhov hluav taws kub qhov rooj kaw yuav ua suab nrov thaum muaj xwm ceev, uas tuaj yeem ua rau tib neeg ceeb toom tam sim ntawd thiab daws qhov xwm txheej. Nyob rau tib lub sijhawm, qhov hluav taws kub qhov rooj xauv tsis tas yuav tsum muaj tus yuam sij, uas yooj yim heev rau kev tswj hwm.