空气动力学性能是否能在飞机的尺寸和速度上按比例放大，则是另外一件事情。
And whether any aerodynamic effects could scale appropriately for aircraft sizes and speeds is another matter.
从铁饼在空气中飞行所受到的气动力出发，阐述铁饼飞行的轨迹和铁饼出手时的速度、角度、自转角速度和风作用对成绩的影响。
The path of discus flight and the effects of the throw velocity/angle, spin and wind conditions on discus flight are discussed in this paper, considering the aerodynamic force on the discus.
此外，作物残茬、秸秆和牧草等粗糙元的高度、密度及直立性均对下垫面的空气动力学粗糙度、摩阻速度及风速脉动有一定影响。
In addition, the height, density and perpendicularity of remnant stubble, straws and grass had influence on aerodynamic roughness and wind velocity fluctuation on different underlying surfaces.
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