除非你在空气动力学实验室工作，否则没有人知道汽车在空气的阻力下行驶时，75英里的时速比65英里要多消耗多少能量，事实是这个差距非常大。
Unless you work in an aerodynamic lab, you don't understand how much more energy it takes to push a car through the air at 75 MPH than at 65 MPH, but it's huge.
受到美国空军资助的加州马里布hrl实验室的研究人员正在致力于天线的全息阻抗表面研究，以此为飞机提供更好的空气动力性能。
Air Force-funded researchers at HRL Laboratories in Malibu, Calif., are working on holographic impedance surfaces for antennas that will give aircraft improved aerodynamics.
设计了中心给粉旋流煤粉燃烧器，并进行了实验室冷态试验、现场空气动力场试验和热态试验。
Design central coal feeding swirl burner and carry on laboratory test while being cool, on-the-spot air power field test and test while being hot.
设计了中心给粉旋流煤粉燃烧器，并进行了实验室冷态试验、现场空气动力场试验和热态试验。
Design central coal feeding swirl burner and carry on laboratory test while being cool, on-the-spot air power field test and test while being hot.
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