Yog tias muaj ib yam dab tsi uas yuav tsum tau coj mus deb ntawm ob peb xyoos dhau los, nws yog li cas cov khoom lag luam yuav tsum hloov pauv. Cov tuam txhab lag luam tseem tshaj tawm cov txiaj ntsig tag nrho thaum kev lag luam raug kev txom nyem los ntawm qhov tsis sib xws ...