Cov khoom sib tw (tom qab kev muag khoom), sib npaug zoo rau qhov qub thiab pom zoo. Rau kev sib dhos, nws yog ib txwm pom zoo kom hu rau cov neeg ua haujlwm tsim nyog.

NB Daim duab ntawm kev tshaj tawm yog qhia txog cov khoom muag. Yog hais tias muaj kev xaiv ntawm sab xis (sab neeg nrog caij) lossis sab laug (saib tsav tsheb), xa mus rau qhov uas tau sau rau hauv cov lus piav qhia.