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

当钻到页岩时，从侧面将高压水、沙子和其它东西注入页岩内。

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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