Kua, tsis muaj kev ua xyem xyav, qhov tseem ceeb rau txhua lub tsev. Tab sis, hmoov tsis, feem ntau ntws tawm muaj qhov tsis muaj qhov tseem ceeb thiab muaj peev xwm txawm tias muaj cov tsos ntawm lub tsev.
Niaj hnub no, cov pej xeem tsis tsuas yog ntiag tug xwb, tab sis kuj tau cov tuam txhab cov tuam tsev pib muab cov dej ntws tawm mus rau qhov kev ua haujlwm ntawm txoj kev kos duab tiag. Ntws nrog kev kos duab, tawg ntws los yog txawm tias lub txaj hnav paj: Ntawm no yog qee cov tswv yim tsim muaj tswv yim tshaj plaws rau cov khoom tsis tseem ceeb no.
