Txawm hais tias yug me nyuam thaj yog ib qho tseem ceeb ntawm cov neeg ua liaj ua teb, cov noog no zoo heev rau kev tu vaj hauv tsev. Nyob rau tib lub sijhawm, nws tsis tas yuav cog tag nrho cov tsiaj nyuj thiab fatten cov noog muag, lawv tuaj yeem bred yooj yim rau tus plig, thaum tau txais cov txiaj ntsim zoo hauv daim ntawv cov nqaij, daim siab thiab cov tshuaj fluff.
Qeb Dej qab zib
Thaum lub caij nplooj ntoos hlav hnub melts txias snow, birches pib nyuaj ntawm hibernation. Los ntawm lub trunks rau o buds thiab ceg me me nyhav birch SAP los, raws li nws yog tseem hu ua, - kua ntoo. Nws muaj ib tug loj npaum li cas minerals, cov vitamins thiab acids, uas yog tsim nyog rau txoj kev loj hlob thiab flowering ntawm birch.