The geophysicists went on to conduct a second test in an abandoned copper mine in Arizona, using 25 iron plates spaced at various intervals in tunnels up to 45 metres below ground.
地球物理学家又在亚利桑那州一个废弃的铜矿矿井进行了第二次试验,他们将25块铁板有间隔的放置在地下45米出的坑道中。
Arizona now has the second highest poverty rate in the nation, after Mississippi.
亚利桑那州的贫困率现居全国第二,仅次于密西西比。
Thousands of firefighters have been battling the blaze, dubbed the Wallow fire, the second biggest in the history of Arizona.
数千名消防员已在奋力试图扑灭这场亚利桑那历史上第二大,被称为“打滚的火球”的大火。
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