1.b> 1) () i> ..i>; ; ; ; to refine oil ; to refine sugar ;
2) () i> ..i>;
2.b> 1) (), , (, i> .i>); the engineers spent months refining the software / ; to refine a language ; an education that refined his taste , ;
2) (), ; his taste has refined ;
3.b> (on, upon) 1) / (); i> ; ( i>); to refine upon a question ;
2) / () / ( i> .i>); politicians who refine upon words , ;
4.b> (on, upon) i> (); i> ; to refine upon another's invention ; eighteenth century poets thought they could refine upon / on / their predecessors , ;
5.b> (.i> away, out) () / ( i>).
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