Cov menyuam chains ua lub luag haujlwm tseem ceeb hauv ntau yam kev lag luam xws li kev tsim khoom, tsheb, thiab kev ua liaj ua teb, qhov chaw uas lawv tau siv los xa cov hluav taws xob zoo.Txawm li cas los xij, ib qho kev txhawj xeeb ntawm cov neeg siv yog cov hlua khi hlua khi rau lub sijhawm.Peb feem ntau hnov cov lus nug: "Ua rau cov menyuam chains nres st ...
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