Raws li ib qho tseem ceeb ntawm cov khoom siv hluav taws xob, cov xauv ntse ntse siv zog txhawb zog, thiab cov roj teeb yog lawv lub zog tseem ceeb.Nws yog ib qho tseem ceeb rau qhov tseem ceeb ntawm kev nyab xeeb thiab kev ua haujlwm zoo hauv kev xaiv cov roj teeb uas yog, vim tias qhov qis dua tuaj yeem ua rau bulging, to, thiab thaum kawg ua rau lub xauv, sho ...
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