Ua ntej tshaj plaws, kev lag luam muaj peev xwm ntawm kev txiav cov ntaub ntawv tseem ceeb heev, thiab qhov chaw ua haujlwm kuj tseem ceeb heev. Kev tso kawm txuj ci, cov cuab yeej tshem tawm plua plav, thiab tsim kom muaj chaw ua haujlwm zoo yog txhua yam kom tsis txhob ua yuam kev.
Thib ob, thev naus laus zis ntawm kev ua cov tso tsheb hlau luam, kev txawj ntawm kev ntxuav lub tank, thiab kev paub txog kev tswj cov khoom noj, kom cov ntaub ntawv sib npaug sib npaug, cov khoom uas tuaj yeem tawm hauv cov xuab zeb zoo tshaj plaws, tshem tawm cov hluav taws xob zoo li qub, thiab tsis txhob cuam tshuam cov teeb meem. xws li kev noj zaub mov tsis zoo. Qhov tsim qhov sib txawv loj ntawm lub paddle yuav cuam tshuam rau lub sijhawm ntaus.
Cov kev xav tau ntawm cov khoom siv xim yuav tsum tau muab tso rau sab saud, qhov seem seem me me, thiab kev ruaj ntseg yog xyuas kom meej.
