Peb twb tau txheeb xyuas qhov cuam tshuam ntawm kev lag luam ntawm cov neeg siv khoom tsis zoo nrog rau kev tshaj xov xwm. Yuav ua li cas tsuas teb? Koj puas paub tias 7 tawm ntawm 8 cov lus tshaj tawm ntawm cov khoom lag luam tsis teb tsis pub dhau 72 teev? Ua ke nrog qhov tseeb muaj 21% nce hauv cov lus rau cov hom thoob ntiaj teb (18% hauv Tebchaws Meskas) thiab peb tau txais ...