Lub qhov rooj hluav taws yog ib yam khoom siv hluav taws xob uas tau lees paub los ntawm kev ua lag luam, nws tuaj yeem kov yeej cov kev phom sij zais hauv ntau qhov chaw. Lub qhov rooj hluav taws faib qhov chaw ntawm lub tsev mus rau ntau qhov chaw hluav taws, yog li ntawd txhua qhov hluav taws kub muab faib thaum muaj hluav taws, nws tsis tuaj yeem kis tawm mus rau hauv ib lub sijhawm, kom tswj tau qhov hluav taws kub zoo.

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