Cov roj tseem ceeb yog cov khoom siv ntuj tsim tawm los ntawm nplooj, paj, thiab stems ntawm cov nroj tsuag.Txoj hauv kev uas siv cov roj tseem ceeb tshaj plaws yog nqus tau lawv, ob qho tib si rau lawv cov ntxhiab tsw zoo thiab lawv cov khoom kho mob.Tab sis lawv kuj tuaj yeem siv rau hauv diffusers thiab humidifiers, nrog rau dil ...
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