即使当前汽车越来越高效，新混合动力车也更实用，南达科他州、德克萨斯州、阿拉斯加州和近海的石油储量还在继续保持上升。

The amount of oil in the Dakotas, in Texas, in Alaska, and offshore climbs too, even as cars are getting more efficient and new hybrids become more practical.

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“由于与其他类型的混合动力车一起，高效的益处在极大程度上依赖这些车辆的“工作循环”，”亚当斯说。

“As with other types of hybrids, the efficiency benefits are heavily dependent on the vehicles’ duty cycle, ” Adams said.

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“由于与其他类型的混合动力车一起，高效的益处在极大程度上依赖这些车辆的“工作循环”，”亚当斯说。

"As with other types of hybrids, the efficiency benefits are heavily dependent on the vehicles' duty cycle," Adams said.

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