. . "ing about exchange including sales ??? ??? ??? por to mean on behalf of or in favor of ??? ??? ??? por to express a length of time ??? ??? ??? por to express an undetermined or general time meaning durring ??? ??? ??? por for means of communication or transportation ??? ??? ??? por in cases of mistaken identity or meaning to be seen as ??? ??? ??? por to show the reason for an errand with ir, veni" . .