目前世界石油供应多元化的格局不仅形成，而且正不断得到强化。
Through analysis, the author realizes that the diversification of pattern of the world oil supply not only has been formed but also is being intensified constantly.
目前世界石油供应多元化的格局不仅形成，而且正不断得到强化。
Through analysis, the author realizes that the diversification of pattern of the world oil supply not only has been formed but also is being intensified constantly.
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