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.
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.
汽车在车轮旋转情况下，阻力系数和升力系数比车轮静止情况下的低。
The coefficient of drag and coefficient of lift in the circumstance of rotating wheels is lower.
结果表明：雷诺数对阻力系数影响较大，现场实测值比风洞试验所得值小约15％，对升力系数及力矩系数影响较小。
The drag coefficient derived from filed measurement was 15 percent less than that of wind tunnel test. On the contrary Reynolds number has a minimal effect on lift force and moment coefficient.
结果表明：雷诺数对阻力系数影响较大，现场实测值比风洞试验所得值小约15％，对升力系数及力矩系数影响较小。
The drag coefficient derived from filed measurement was 15 percent less than that of wind tunnel test. On the contrary Reynolds number has a minimal effect on lift force and moment coefficient.
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