提煉, 精煉
remove impurities or unwanted elements from (a substance), typically as part of an industrial process.
:
• The company uses advanced techniques to refine crude oil.
該公司採用先進技術提煉原油。
• Sugar is refined to remove molasses and other impurities.
糖經過精煉以去除糖蜜和其他雜質。