[fáng bèi]
guard against; take precautions against; premunition
take precautions against fire
防备火灾
be prepared for surprise attacks by the enemy
防备敌人突然袭击
protect the children from catching cold
防备孩子们受冻
Close the gate of the pen properly to prevent the sheep from getting away.
把羊圈关好，防备羊群跑掉。