Tam sim no, kev xa tawm ntim ntawm cov khoom lag luam loj xws li cov khoom siv hauv tsev, rooj tog zaum, khoom siv dag zog, cov khoom siv kho kom zoo nkauj, tshuab thiab khoom siv, thiab tsheb yog nce.Txawm li cas los xij, vim qhov tshwj xeeb ntawm qhov ntim thiab qhov hnyav ntawm cov khoom, lub export tra...
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