refine
/rɪˈfaɪn; rɪ`faɪn/ v[Tn]
1 remove impurities from (sth); purify 从（某物）中除去杂质; 精制; 精炼; 提纯
refine sugar, oil, ore, etc 制糖、 炼油、 提炼矿石
refining processes 提炼过程.
2 improve (sth) by removing defects and attending to detail （去粗取精、 一丝不苟）改良（某事物）
refine one's working methods 改进自己的工作方法
refine earlier systems, designs, theories 改良原先的制度、 设计、 理论.
3 (fig 比喻) make (sb/sth) more cultured or elegant; remove what is coarse or vulgar from 使（某人[某事物]）更有教养或更文雅; 使去掉粗俗言行
refine one's manners, taste, language 使举止更优雅、 趣味更高雅、 语言更文雅.