这些就是石油输出国组织国家能观察到买主在1973年高价争购石油的主要原因。
These were the main reasons why the OPEC countries were able to observe a scramble among buyers to pay higher prices for oil in 1973.
确实，生物能源已经成为除属于“石油输出国组织”成员国家外最大的单一新增燃油产出来源。
Indeed, biofuels have become the single biggest source of new fuels produced outside of countries belonging to the Organization of the Petroleum Exporting countries.
那些国家试图通过石油输出国组织控制石油产量，但是他们常常很难坚持预定的目标。
Those countries try to regulate oil production via OPEC, but they often fail to stick to predetermined targets.
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