1. Cov khoom sib txawv Cov khoom siv yog qhov tseem ceeb tshaj plaws ntawm cov khoom, tab sis kuj yog lub hauv paus ntawm cov khoom. Tsuas yog los ntawm kev tso lub hauv paus zoo, yav tom ntej siv, yuav ruaj khov thiab txhim khu kev qha. Ntau tus neeg xav tias ci xim yog ib qho cuab yeej, txheej txheem, qhov tseeb, nws tsis yog, ci xim yog ...
Nyeem ntxiv