如果美国一定要利用燃油效率标准来减少车辆排放，那么猛药胜于软药。
If America insists on using fuel-efficiency standards to cut vehicle emissions, then tough ones are better than weak ones.
虽然有大量删节，但参议院最终仍通过了一项能源提案，将提高车辆的燃油效率标准。
And the Senate approved an energy bill that, though drastically stripped down, finally raised federal fuel-efficiency standards for vehicles.
但是我们还没有完成。在未来几周和几个月，我们将发布一个第二轮重型车辆的燃油效率标准。
Butt we're not done yet. In the weeks and months ahead, we'll release a second round of fuel efficiency standards for heavy-duty vehicles.
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