By 2007, DuPont was saving $2.2bn a year through energy efficiency, the same as its total declared profits that year.
直至2007年,杜邦通过提高能源效率,每年能节省22亿美元,这与其当年公布的总利润相当。
By 2007, DuPont was saving $2.2 billion a year through energy efficiency, the same as its total declared profits that year.
到2007年,杜邦公司通过提高能效一年节省22亿美元,和它那年公布的总利润一样多。
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