Thawj chav yog tib yam li qhov thib ob.Yog tias ntxiv dej ces chav tsev tuaj yeem siv los tshem tawm cov hmoov luam ntawv.Chav tsev thib ob yog peb-cov menyuam tsim, uas nws cov menyuam roj hmab tau txais cov khoom tshwj xeeb kom nws tuaj yeem sib npaug cov khoom siv nrog cov txiaj ntsig zoo.Thiab nws haum rau cov dej-raws li / roj-raws li roj thiab cov kua roj vanish, thiab lwm yam. Lub tsev tuaj yeem kho tau yooj yim ntawm ib sab.