Ntau cov tshuaj npaj tau siv rau hauv cov ntsiav tshuaj, granule, hmoov, thiab kua daim ntawv.Feem ntau, cov ntsiav tshuaj tsim nyob rau hauv ib daim ntawv qhia rau cov neeg mob nqos los yog zom ib tug meej koob tshuaj.Txawm li cas los xij, tshwj xeeb tshaj yog cov neeg mob laus thiab menyuam yaus muaj teeb meem zom lossis nqos cov kua qaub ...
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