求高手翻译一段英文，不要电脑翻译的~谢谢

Finally, utility companies buy power from the wholesale
market and supply it to electricity customers. Chilean
utilities are oft en well-known companies that have a
geographic monopoly through a concession granted by
the Ministry of Economy, which awards concessions for an
indefi nite period of time for electricity systems greater than
1,500 KW