In fictional visions of the future they fill the skies, zipping people around in air-cushioned comfort. But flying cars have been conspicuously absent from real life.

• 在未来的幻想中，它们布满天空，让人们舒舒服服地在气垫帮助下迅速在空中穿梭。但是能够飞行的汽车在现实生活当中是截然不存在。