Nrog txoj kev loj hlob ntawm lub sijhawm thiab kev nce qib ntawm kev tshawb fawb thiab kev siv thev naus laus zis, kev txhim kho kev lag luam coj zaub muaj kev taug kev ntev thiab nyuaj los ntawm cov duab dub thiab dawb thaum ntxov hauv ntiaj teb mus rau kev hloov zoo hauv lub ntiaj teb xim. Nrog kev nruam ntej ntawm kev tsim kho tshiab hauv kev lag luam thev naus laus zis, lub vijtsam tso saib tau maj mam "khoov", thiab cov zaub rov qab tau yooj yim dua ib zaug kev rhuav tshem cov kev txwv thiab ua txhua yam kev lag luam tso tawm.
Cov ntxaij vab tshaus ua tau zoo saib, thiab cov qauv hloov pauv tau yooj yim hauv cov duab ntawm lub tog raj kheej, sab hauv arc, thiab cov hlua xev yog nyiam los ntawm cov duab tshwj xeeb. Yog li ntawv, cov ntxaij vab tshaus hloov tau yuav dhau los ua tus qauv yav tom ntej, thiab kev npaj hauv nroog loj yog qhov tseem ceeb. Radiant muaj tswv yim tsim tau muaj txiaj ntsig los ntawm nws cov peev xim hloov tau yooj yim, nrog cov ntxaij vab tshaus hloov tau yooj yim thiab cov ntxaij vab tshaus pob tshab tau siv dav hauv cov tsev ua lag luam, khw hauv khw, tsev khaws khoom tshawb fawb, thev naus laus zis thiab thev naus laus zis, tsheb 4S khw muag khoom, thiab cov khw muag khoom muaj npe.