Tshuav qhov hnyav, tseem hu ua cov log tsheb sib tw hnyav. Nws yog qhov sib xyaw tiv thaiv tiv thaiv tau muab nruab rau ntawm lub log ntawm lub tsheb. Kev ua haujlwm ntawm qhov sib npaug hnyav yog khaws cov log hauv lub zog sib npaug hauv kev sib hloov ceev.
Xa kev nug