Muab faib cov khoom noj ntim rau txhua pluas noj tau tsim los ua ke rau tag nrho koj cov kev xav tau kev noj qab haus huv. Cov thawv no yog qhov tsim nyog rau kev pabcuam cov pib, cov chav kawm tseem ceeb, nrog cov khoom noj qab zib, nrog faib cov khoom noj uas ua kom txhua yam ntawm koj cov zaub mov. Lawv zoo tshaj plaws rau kev siv txhua hnub, cov kev pab cuam, thiab txheej xwm.
Cim npe nrov: Muab faib cov khoom noj rau txhua pluas noj - txij thaum pib cov khoom noj khoom haus, Suav teb cov khoom noj khoom haus rau cov khoom noj khoom haus, cov chaw muag khoom
