Cov rooj tog zaum sab nraum zoov thiab cov lus rau kev siv feem ntau yog hais txog cov khoom siv hauv tsev thiab cov lus qhia sab nraud rau cov tib neeg txoj kev ua si zoo nkauj, xis thiab noj qab nyob zoo hauv zej zog. Nws yog lub ntsiab tseem ceeb uas txiav txim cov khoom siv ntawm sab nraum zoov muaj nuj nqi thiab sawv cev rau daim ntawv ntawm sab nraum zoov. Sab nraum zoov cov khoom lag luam tsis tsuas yog ua ib qho chaw zoo nkauj los kho lub nroog, tab sis kuj tseem ua haujlwm noj mov yooj yim rau cov neeg siv khoom noj.
Kev lag luam ceev ceev kev lag luam feem ntau yog hais txog cov khw muag khoom, thiab cov hom phiaj loj tshaj plaws yog tias cov khoom siv sab nraum zoov loj, yog li qhov kev thov rau cov rooj tog sab nraum zoov yog
1. Tsis txhob siv sijhawm ntau
2. Kev hloov pauv muaj zog, tuaj yeem teeb tsa cov lus ntawm yuav (yog li feem ntau ntawm cov khw nojmov cov ntawv square);
3, yog li siv tus nqi ntawm cov rooj thiab cov rooj zaum yog loj, zoo zoo, ruaj khov;
4. Thaum kawg tab sis tsis tsawg kawg, tau txais tus nqi yog.
