xim
Cov xim pleev xim yog siv los pleev xim rau sab nrauv ntawm cov tsev, yog li ib qho ntawm qhov ntsuas tseem ceeb tshaj plaws yog qhov kev tiv thaiv rau kev tiv thaiv UV hluav taws xob, uas yuav tsum tau siv lub sijhawm ntev thiab tsis muaj xim hloov.