1.A vertical-takeoff aircraft, like the hummingbird, has a very high metabolism, which means it requires a lot of energy.
垂直升降飞机，就像蜂鸟一样新陈代谢速度非常快这意味着它们需要很多能量。
2.In fact, the aircraft companies gave up on vertical-takeoff aircraft more or less for a number of years.
事实上，飞机制造公司一度放弃了垂直升降飞机差不多几十年。
3.Moller International, based in Davis, Calif. , is developing personal vertical takeoff and landing aircraft.
总部位于加州戴维斯的穆勒国际公司正在研发个人垂直升降飞机。
4.He's been working on VTOL (vertical takeoff and landing) personal vehicles since the late 1960s.
他从20世纪六十年代七一直在研究垂直起降（VTOL，verticaltakeoffandlanding）的个人交通工具。
5.A vertical-takeoff aircraft needs an artificial stabilization system -- that's essential.
垂直起飞的飞行器需要一套平衡稳定系统这非常重要。
6.Modeling and Analysis of the Drift Magnitude of Rocket during Vertical Takeoff Phase
火箭垂直起飞段漂移变化的建模与分析
7.vertical takeoff and landing aircraft
垂直起落飞机