Raws li lub tuam txhab kev lag luam roj hmab ua lag luam tsom rau cov khoom siv raw khoom, khoom siv, tsim thiab kev tsim kho, peb lub tuam txhab tau cog lus los muab cov kev daws teeb meem tshiab rau ntau yam kev lag luam. Ib qho ntawm peb cov khoom muag zoo tshaj plaws yog cov khoom siv roj hmab fluted, tsim los rau ...
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