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TOEFL IELTS BNC: 7830 COCA: 6600
refine/rIˋfaIn; rIˈfaIn/ v [T] 1 to use an industrial process to make a natural substance more pure 净化﹔提炼﹐精炼: The sugar is refined and then shipped abroad. 糖被精炼后用船运到国外。 2 to improve a method, plan, system etc by making small changes to it 对〔方法﹑计划﹑系统等〕作细微改进﹐改善refinement n [U]

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