But within five years, Nasa researchers hope to develop technology for a small plane that can fly out of regional airports, costs less than $100,000 (&55,725), is as quiet as a motorcycle and as simple to operate as a car.

• 不过，美国国家航空航天局的研究人员希望在今后的五年内能够开发出一种技术，使小型飞机不受地区机场的限制，花费不到10万美元，而且噪音与汽车相当，操纵起来也和开汽车一样简单。