Raws li qhov kev thov rau cov khoom siv hlau, cov khoom siv, thiab cov khoom lag luam txuas ntxiv mus, yog li qhov kev xav tau ntawm kev ua haujlwm siab, txhim khu kev qha kev tsim khoom uas tuaj yeem tsim cov qauv ntawm cov hlau nyuaj.Vim qhov kev thov no, hlau stamping tau dhau los ua ib qho ntawm ntau yam thiab nrov tsim cov txheej txheem ...
Nyeem ntxiv