<prompt> Translate the following text to EnglishHata hivyo, mfumo kama huo hauwezi kuwa bora zaidi, na moja ya hasara ni kwamba barua ndogo za kipande kimoja zinaweza kuwa na kiwango cha juu cha kutosha kufunika maeneo yote.  <response>: Such a system, however, might not be the most desirable, one downside being that the smallest single-piece mailers could default to a rate that is high enough to cover all destinations. 