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uses
  StrUtils;
var
  S, SubStr: string;
  I: integer;
begin
  S := '·¨À­ÀûÅܳµ';
  SubStr := 'Åܳµ';
  I := PosEx(SubStr, S, 0);  //´ÓµÚNλ¿ªÊ¼²éÕÒ,»òÕßÓÃPos(SubStr, S)
  if I >= 0 then  //ÕÒµ½Æ¥ÅäµÄ×Ö·û´®
  begin
    //...
  end;
end;

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