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to refine (a substance)
to purify
to refine (one's skills, writing etc)
refined
polished
succinct
skilled
capable
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。