Lub luag haujlwm ntawm qhov rooj hluav taws yog tiv thaiv kev sib kis ntawm hluav taws thiab kev sib kis ntawm cov pa taws. Nquag kaw qhov rooj hluav taws tuaj yeem tiv thaiv kev sib kis ntawm cov pa taws. Tom qab hluav taws kub tam sim ntawd, kom ntseeg tau tias txoj kev khiav khiav khiav zoo yog ib txoj hauv kev kom txo tau cov hluav taws kub nyhiab.