Hauv kev lag luam xws li tshuaj lom neeg niaj hnub, zaub mov, thiab tshuaj, kev ntim khoom zoo cuam tshuam ncaj qha rau cov khoom duab.Tsis siv neeg ob -sided labeling tshuabyog ib qho tseem ceeb ntawm kev ntim cov kab ntau lawm, haum rau ntau hom ntim xws li lub tiaj tiaj, square, thiab puag ncig lub thawv.
Lub tshuab tuaj yeem ua tiav daim ntawv lo rau ntawm ob sab ntawm cov khoom nyob rau hauv ib qho kev pub noj, deb tshaj li cov txheej txheem phau ntawv sau npe thiab yooj yim txuam cov pace ntawm cov kab ntau lawm niaj hnub.
Cov ntawv sau meej thiab cov ntawv tiaj tus ua rau cov khoom zoo nkauj zoo nkauj dua, txhim kho lawv cov kev pom zoo. Lub tshuab muaj peev xwm nrhiav tau qhov ntse, tiv thaiv daim ntawv lo thiab cov khoom pov tseg thiab txo cov nqi tag nrho.
