The world’s largest oil and gas groups shed more than a billion barrels of reserves in 2014, the sharpest decline in at least six years, according to figures that show their exploration record has worsened as big discoveries dwindle.
數據顯示，2014年世界最大油氣集團的儲量降低了逾10億桶，為至少6年來的最大降幅。這些集團的勘探結果變糟，重大發(fā)現顯著減少。
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