"When you sail at very high speeds, around 100 km/hour, the water becomes like a rock," he said.

“当你以非常高的速度航行时，大约每小时100公里时，水相对于你来说变得就像是石头，”他说。

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Both tree species hug water sources in this arid land of high plateaus and rock towers.

在岩石成塔的高原贫瘠地带，这两种树涵蓄了水源。

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Shale traps gas more tightly than other rock. To extract it, the shale is blasted with huge volumes of fresh water at high pressure, a practice known as hydraulic fracturing, or "fracking".

页岩储藏气体比其他岩石更密封，要从中抽取就必须用海量淡水在高压下炸开页岩并，这种方法叫做水压致裂法。

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They drill down to the shale, then go sideways and inject high-pressure water, sand or other material into the rock.

VOA: special.2009.10.23

Fracking is the process of blasting water at high pressure into shale rock to release oil or gas held within it.

BBC: US oil production 'to jump by a quarter by 2014'

Under the process of fracking, oil or gas is extracted from shale rock by pumping a mixture of sand, water and chemicals into the rock at high pressure.

BBC: Shale will free US from oil imports, says ex-BP boss

Fracking involves drilling a borehole before a high-pressure water mixture is directed at the rock to release the gas.

BBC: Keynsham fracking plans put on hold by UK Methane