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4.0 tawm ntawm 5 lub hnub qub (raws li 2 xyuas)
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Kev Lag Luam Tsis Muaj Npe
tus uas muab, yuav tsum tsis txhob nug dab tsi nyob rau hauv rov qab
tus uas tau txais, yuav tsum tsis txhob muab dab tsi rov qab