关上车窗：这能增强汽车的流线性，降低空气阻力，可以提高百分之十的燃料利用率。
Close the windows: it reduces the inherent aerodynamic sleekness of your car, and can lead to a 10% decrease in fuel economy.
良好的风幕系统可以提高冷空气的利用率，达到减少热负荷，节约能源的目的。
Well-designed air curtain could make use of cool air effectively, reduce the heat load and save the energy.
本研究中的数值仿真结果表明，在太空中采用管道空气输送能够最大限度地减小压力损失从而提高能源利用率；
Numerical simulation results indicate that in outer space air transportation of powder in pipes can reduce pressure losses and improve energy utilization ratio.
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