The aquifers range from 1,000 to 3,000 feet below the ground, which means that pumping will be expensive and there are other concerns.

地下含水层位于地下1000到3000英尺之间，这意味着抽水成本很高，还有其他接踵而来的问题。

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of which seven were below the ground.

其中有七层楼是建在地下的。

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The local limestone is so porous that all the rainwater immediately sinks below ground.

当地的石灰岩如此多孔以致所有的雨水很快渗到地下。

《柯林斯英汉双解大词典》

The clay will be found about one meter below the ground.

VOA: special.2009.09.14

The deepest part of the mine is nearly two thousand five hundred meters below ground.

VOA: special.2009.07.21

Warm air rising from below causes the wind tube to reach toward the ground.

VOA: special.2010.05.11

Some claim that oil producers are in effect hoarding oil below the ground.

ECONOMIST: The oil price

In the 13th century a great Icelandic bard, Snorri Sturluson, wrote of dark elves who live in caves below the ground.

ECONOMIST: Free that gnome

These include increasing difficulties of mining far below the ground in the key producing nation of South Africa, as well as labor issues that mean higher costs and the threat of supply disruptions due to strikes.

FORBES: Gold Prices Poke Above Platinum On Global Macroeconomic Concerns