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Dab tsi yog hom log ntawm cov menyuam yaus caij tsheb?
Lub log yog txuas lub tsheb thiab hauv av, lawv yog qhov tseem ceeb ntawm kev tuav.Ceev, tswj thiab txawm lub tsheb nyab xeeb.Yog li ntawd nws yog ib qho tseem ceeb uas yuav tau xyuam xim rau lub log ntawm lub tsheb.Rau cov menyuam yaus caij tsheb, muaj ob hom log: yas log EVA log.Ntawm no yog qhov txawv ntawm ...Nyeem ntxiv
