Tshuaj pleev ib ce txhais tau tias tshuaj pleev ib ce yog hais txog cov khoom siv tshuaj niaj hnub uas siv rau ntawm daim tawv nqaij, plaub hau, rau tes, daim di ncauj thiab lwm qhov chaw ntawm tib neeg los ntawm kev txhuam, tshuaj tsuag lossis lwm yam zoo sib xws rau kev tu, tiv thaiv, kho kom zoo nkauj thiab hloov kho.Supervision Hom Tshuaj pleev ib ce tshwj xeeb ...
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