Dab tsi scenarios yog kev sib tham sib vaj huam sib luag feem ntau siv hauv? Dab tsi yog qhov zoo?
Kev sib tham sib vaj huam sib luag feem ntau yog siv rau hauv kev sib tham hauv tuam txhab, tsoomfwv cov koom haum, kev cob qhia, cov tsev kawm ntawv, tsev kawm ntawv, cov chaw ua yeeb yam thiab lwm yam xwm txheej, uas tseem yog cov ntawv thov tseem ceeb ntawm kev sib tham sib vaj huam sib luag. Dab tsi yog qhov ...
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