19世纪初美国邮政使用了气动管精密系统，但伦敦使用了完全不同的方式，建立了这个小规模的铁路系统，只能用于包裹运输使用。
The USPS used an elaborate system ofpneumatic tubes during the early 19th century, but London took anentirely different approach and built this scaled-down railroad systemto be used only for parcels.
至于模仿飞鸟飞行来改善飞机的空气动力学性能，Usherwood也不是完全有信心，但是他也并没有排除这种可能性。
As for imitating avian anatomy to amplify airplane aerodynamics, Usherwood isn't wholly convinced - but he doesn't rule out the possibility, either.
警犬号超音速喷气式汽车研究团队的首席工程师，马克·查普曼(Mark Chapman)说：“我们在这一年里完成了所有的空气动力学的工作，汽车才能完全稳定在马赫为1.3的速度上。
Mark Chapman, Bloodhound SSC's chief engineer, said: "From all the aerodynamic work we have done this year, the car is completely stable at mach 1.3.
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