The second epiphany was that the extracted gas had a significantly different isotopic makeup from what is usually produced in nuclear reactors.

第二项大发现是，萃取出来的 气体，同位素 组成与一般核反应器中所产生的大不相同。

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The experiments were carried out on a combustion research facility (CRF) and chemical titration was used to measure the NH3 slip of extracted gas that goes out from the rear flue.

选择性非催化还原过程试验研究是在燃烧试验装置上进行的，在尾部烟道抽取烟气采用化学滴定法测量烟气中的NH3漏失含量。

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Shale gas, extracted from rock by the controversial process of fracking, will make up a fifth of supplies by that date.

通过颇有争议的提取过程从岩石中提取出来的页岩气，到2035年将构成第五大供给能源。

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Shale gas is extracted by tapping gas from shale rock using a process called hydraulic fracturing, or fracking.

BBC: BHP Billiton in $3.3bn writedown as gas prices plunge

Unlike helium, which is extracted from natural gas, nitrogen can be readily harvested from the air, and cooled for a fraction of the price.

ECONOMIST: Inside story

Assuming it keeps the oil and gas extracted from under Scottish waters, an independent Scotland would currently gain roughly as much in taxes as it would lose in subsidies (see article).

ECONOMIST: Scottish independence would come at a high price