clear up;purify;cleanse;clean 水的～purification of water/～邊界clear up the border areas/～空氣purify the air/～人類靈魂cleanse human souls/～社會(huì)環(huán)境purify social environment/～污水 purify sewage water/～語(yǔ)言purify the language /～器purifier/～塔purifying column