Cov txheej txheem ntawm lub thawv ntawv yog dab tsi? Cov txheej txheem ntawm lub thawv ntim khoom plig yog kwv yees muab faib ua peb hom: phau ntawv hom thawv, lub npov saum ntuj thiab lub ntiaj teb, thiab cov thawv tshwj xeeb. Feem ntau, cov txheej txheem pasty cov ntawv ntim cov txheej txheem tau muab faib ua xya yam: tsim, pov thawj ...
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