Lub dab dej yog qhov tseem ceeb ntawm txhua chav ua noj niaj hnub. Yog li ntawd, nws yog ib qho tseem ceeb uas nws tsis yog tsuas yog xis nyob, tab sis kuj multifunctional, vim hais tias nws yog nyob ze nws uas feem ntau ntawm txhua tus niam tsev dhau mus. Yog li ntawd kev ntxuav tais diav tsis tig mus rau hauv lub luag haujlwm nyuaj thiab tsis kaj siab, nws yog ib qho tseem ceeb uas yuav tsum tau saib xyuas qhov kev nplij siab ntawm qhov chaw ua haujlwm. Tom qab nyeem tsab xov xwm no, koj yuav kawm paub tias dab tsi hauv chav ua noj yog dab tsi