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Nov yog cov ntaub ntawv davhlau davhlau tshwj xeeb tsim rau cov ntaub ntawv sau thiab cov ntaub ntawv nyiam. Nws tuaj yeem tuav 80 cov ntaub ntawv.
Peb yog lub Hoobkas nrog 15 xyoo ntawm kev paub, tshwj xeeb hauv kev tsim cov khoom lag luam kev cai xws li cov khoom pleev, pleev xim, cov rooj plaub, thiab lwm yam.
