◆记忆方法二: 词根词缀记忆法:purify v 使清洁;使纯正(pur+ify化→纯洁化),Pur, purg=pure, 表示“纯洁” ◆记忆方法三: purify (考频:5) 【记】词根记忆:[pure(纯净的)+-ify] vt.提纯,使纯净:The salt has been purified for medical use.已对医疗用盐做了提纯处理。 【考】purify...from sth.从……中提纯/精炼:This factory purifies oil from raw material.这家工厂从原料中提炼石油。