2009年11月，法航荷航集团的一架波音747客机曾在一个发动机中混入50%的生物燃料，并在荷兰成功完成了示范飞行。
An Air France-KLM Boeing 747 using a 50 per cent biofuel mix in one engine successfully completed a demonstration flight in the Netherlands in November 2009.
他最近在美国国家航空NASA的主要科学机构之一，Goddard太空飞行中心(Goddard Space Flight Centre)用电脑模拟向研究人员示范了设计的可行性。
He recently demonstrated a computer simulation of the idea to researchers at the Goddard space Flight Centre, one of the main scientific establishments of NASA, America's space agency.
该公司已经建造了一艘名为Betty、可以遥控的测试飞行器，以示范如何完成基本工作任务。
The firm has already built a remote-controlled test version, called Betty, to demonstrate how the basic arrangement would work.
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