For more than fifty years, he has lived entirely off the public electricity network, or grid.

50多年来，他一直完全依靠公共电网生活。

It is called the " Public Broadcasting System" because it receives some money from the U.S. government, but only a very small amount – much less than the amount of money given to public television networks and channels in other countries.

它被称为“公共广播系统” ，因为它从美国政府那里获得了一些资金，但数额非常小——远低于其他国家/地区的公共电视网络和频道获得的资金数额。