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。

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Overnight storms left many streets underwater and forced the closure of road tunnels in the city.

一夜的暴风雨使城市里的许多街道都淹没在水中，公路隧道被迫封闭。

《柯林斯英汉双解大词典》

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Other workers dug huge tunnels deep in the floor of the canyon.

VOA: special.2009.08.12

-based non-profit Jerusalem Fund he says 80 percent of the goods coming into Gaza are coming in through the tunnels - everything from food,to cars, to live cattle - all this at ridiculously high prices.

VOA: standard.2010.06.17

Cars and trucks are banned from the city (they will travel in tunnels underground) allowing for narrow streets and alleys.

BBC: The Futurist: Masdar City

Mr Gao, it should be noted, was born in 1939 while his parents were hiding from the Japanese in tunnels.

ECONOMIST: China and Japan

In certain cases, such as in tunnels, communication is lost completely.

BBC: Spanish scientists develop more accurate sat-nav system