石油的开采或许会比预计的时间花费要长，同时其量也比英石油估计的时间要少。

The oil may take longer than expected to flow, and there may be less of it than BP believes.

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尽管DMFC产生二氧化碳，其量也是非常小的，足以使人将DMFC看作一种比传统电池环保得多的技术。

Even though DMFCs produce carbon dioxide, the amount is small enough for the cells to count as a much greener technology than batteries.

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