Lub tsev pheeb suab ntaub ua haujlwm ua ntej thov cov kua tshuaj uas tiv thaiv kom zoo, tsis muaj qhov sib txawv ntawm cov qauv siv hluav taws xob tsis sib xws}.
Siv daim npog zaj duab xis los tiv thaiv tag nrho cov chaw ntawm lub rooj tsav xwm es tsis txhob muab kev tiv thaiv kom pom raws li ib puag ncig cov duab ntsej muag tsuas yog muaj nyob ntsuab.