Xov xwm kev lag luam
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Cov tshuaj tiv thaiv puas ua haujlwm tawm tsam ntau yam?
1) Puas yog cov tshuaj tiv thaiv ua haujlwm tawm tsam ntau yam?Lo lus teb rau lo lus nug no yog nyob rau hauv lub ntsiab lus ntawm lo lus "ua hauj lwm."Thaum cov kws tsim tshuaj tiv thaiv tau teeb tsa cov xwm txheej ntawm lawv qhov kev sim tshuaj, lawv ua haujlwm ze nrog cov tswj hwm, xws li Food and Drug Administration (...Nyeem ntxiv
