1. Xaiv lub hwj chim zoo
Lub zog siab, muaj hluav taws xob siab, lub zog tsis txaus, feem ntau lub zog ntawm kev yuav khoom muaj teeb meem, feem ntau ntawm cov teeb meem thiab chaw siv.different qhov chaw ntawm kev siv muaj Yog li ntawd, cov kev xav tau sib txawv rau kev teeb pom kev zoo, xws li kev cob qhia, chaw ntau pob, tsev qiv ntawv thiab lwm qhov chaw, uas yuav tsum tau muaj lub teeb pom kev zoo, xws li warehouses, chaw nres tsheb thiab lwm qhov chaw, uas yuav tsum tau muaj teeb pom kev zoo. Yog li ntawd, yuav tsum tau them nyiaj mloog mus rau qhov chaw siv thaum xaiv teeb . Tsis tas li ntawd, qhov siab ntawm qhov chaw teeb tsa thiab qhov ceev ntawm lub teeb kuj yog cov ntsiab lus rau kev saib xyuas thaum xaiv teeb.
