The Arctic is reckoned to hold around 15% of the world's undiscovered oil reserves and 30% of those of natural gas.
北极被估计保有全球石油储量的15%以及天然气储量的30%。
The U.S. Geological Survey estimates the Arctic has as much as 25 per cent of the world\'s undiscovered oil and gas.
美国地质勘测局估计，北极地区蕴含着多达25%的世界上未发现的石油和天然气。
He and his team had explored for undiscovered oil in horizontal shales deep within the Permian Basin, a vast rock formation beneath West Texas.
他和他的团队勘探到了二叠盆地未探明的水平页岩油，这些地层主要分布在西德克·萨斯盆地。
Although the exploration level of oil and gas resources in the northern Songliao Basin was relative high, there were much undiscovered oil and gas resources.
松辽盆地北部的油气勘探程度虽然较高，但仍然有一些尚未发现的油气资源。
The Arctic holds one-fifth of the world’s undiscovered, recoverable oil and natural gas, the United States Geological Survey estimates.
美国地质调查局估计，北极拥有五分之一全世界未被发现的，可开采的石油和天然气。
The Arctic holds one-fifth of the world’s undiscovered, recoverable oil and natural gas, the United States Geological Survey estimates.
美国地质调查局估计，北极拥有五分之一全世界未被发现的，可开采的石油和天然气。
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