当鱼鳍的形状通过流动的空气产生比其(空气)阻力更多的升力时，飞行物便能飞翔。
When the shape of a wing creates more lift from the air passing around it than it does drag (air resistance), an aircraft will fly.
经测试，飞机的轴驱动升力风扇推进系统可产生超过性能需求的垂直推力比。
The aircraft’s shaft-driven lift fan propulsion system produced more vertical thrust than needed to meet performance requirements.
由于地处高海拔地区，气压较低，因而作用在球上的阻力及升力所产生的空气动力效应也会发生相应反应，最终导致球在空中飞行速度比在低海拔地区快，飞行的路线也更直。
At altitude, the air pressure is lower, and so are aerodynamic effects such as drag and lift, ultimately causing balls to travel faster and straighter than they would at lower altitude.
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