Qhov tsim nyog ntawm ntsev tsuag tshuaj ntsuam rau cov hlua khi hlua txuas.Txawm hais tias nws yog rau cov hlua khi hlua khi, xws li cov khoom sib txuas, cov davhlau ya nyob twg, cov hlua khi, lossis cov hlua khi hlua khi, DV kev xeem tsis tuaj yeem hla qhov ntsuas tshuaj ntsev.Thaum lub tsheb lossis tsheb thauj khoom taug kev, qhov chaw ntawm cov hlua khi hlua khi ...
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