美国土木工程师协会2009年估计36%的美国主要城市高速公路是超负荷的，每年在浪费时间和燃料成本上花费782亿美元。

The American Society of Civil Engineers estimated in 2009 that 36% of America’s major urban highways are congested, costing $78.2 billion each year in wasted time and fuel costs.

youdao

我们节省了15%的能源成本，因为我们没有听取制冷与空调工程师协会的建议向建筑物注入15 - 20立方英尺的新鲜空气。

We saved over 15% in energy costs as we did not have to inject 15-20 CFM of fresh air in to the building as suggested by ASHRAE an industry standard.

youdao

我们节省了15%的能源成本，因为我们没有听取制冷与空调工程师协会的建议向建筑物注入15 - 20立方英尺的新鲜空气。

We saved over 15% in energy costs as we did not have to inject 15-20 CFM of fresh air in to the building as suggested by ASHRAE an industry standard.

youdao