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Cov khau nag no muaj kev ua haujlwm ntawm kev tiv thaiv kev nplua thiab tsis muaj dej.Nws yog qhov tsim nyog rau cov dev mus taug kev hauv cov hnub los nag kom lawv txhais taw qhuav.Xim, qauv thiab qhov loj tuaj yeem ua raws.Yog tias koj xav tau customize, thov hu rau peb.