refined
/rɪˈfaɪnd/A refined substance has been made pure by having other substances removed from it. 去掉杂质的; 精炼的
adjective [原级] 精炼的；有教养的，文雅的；精确的，灵活巧妙的
This technique is becoming more refined and more acceptable all the time. 这项技术变得越来越精密和受人欢迎。
verb [vt. 及物动词] 精炼，提纯；改进，改善；使…文雅（refine 的过去式和过去分词）
El Salvador produces 100,000 tons of refined copper annually. 萨尔瓦多一年生产10万吨精炼铜。
