Sticking to the low end of government estimates, the National Resources Defense Council says there may be no more than 3.2 billion barrels of economically recoverable oil in the coastal plain of ANWR.

美国国家资源保护委员遵照政府预估范围的下限，称在国家野生动物保护区的沿海平原上，经济上可采石油可能不超过32亿桶。

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It has not yet been determined whether this area contains reserves that are economically recoverable.

目前还未能确定此区有否经济上可回报之储量存在。

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Current estimates show approximately 100 Tcf of coalbed methane that appears to be economically recoverable in the lower 48 states alone.

目前的估计显示大约100万亿立方英尺天然气储量的煤层气在经济出现48可收回仅在较低的状态。

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Very often, energy firms will search for as much crude as they believe economically recoverable at the current or projected price of oil.

FORBES: America's (Un)Peak Oil

The unconventional-gas bonanza has roughly doubled the gas resource base, a measure of the total gas in the ground rather than what might be economically recoverable.

ECONOMIST: An unconventional bonanza