飞行汽车始终是个人交通自由的终极象征。
The flying car has always remained the ultimate symbol of personal transport freedom.
不着陆加油地环绕世界飞行被称为是终极的飞机记录，这一直以来被认为是不可能的。
A non-stop flight around the world without re-fueling was the last flight record to be set. The flight always had been considered impossible.
波音公司的“亚音速终极绿色飞行器研究”（SUGAR）团队检验了5个概念。
The Boeing Company's Subsonic Ultra Green Aircraft Research, or SUGAR, team examined five concepts.
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