圣巴巴拉的加利福尼亚大学经济学家克里斯多夫•考斯泰罗和其同事，研究了11000个鱼场，证明了这一点。

That this is so has been shown by Christopher Costello, an economist at the University of California, Santa Barbara, and his colleagues, in a study of over 11,000 fisheries.

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英国石油首席经济学家克里斯多夫•鲁尔表示，随着美国这个世界第一大经济体走出2008年的金融危机，美国工业领域的扩张引领了石油消费的增长。

The consumption growth was led by an expansion of the U. S. industrial sector as the world's top economy emerged from the 2008 financial crisis, BP Chief Economist Christof Ruhl said.

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