Coj los ntawm kev tshawb fawb txuj ci thiab thev naus laus zis ib txwm ua rau sab nrauv thiab cov txheej txheem rau kev txhim kho ntawm cov thev naus laus zis. Txhuas vaj huam sib luag qab nthab yog tias koj txaus siab rau peb cov khoom tshiab txhuas vaj huam sib luag, tos txais koj kom muaj zog cuam tshuam lub zog. Thaum nws raug rau qhov cuam tshuam, nws tuaj yeem tsim tawm qee qhov deformation yam tsis muaj kev sib tawg.
