However, increasing the velocity at a given spin reduced the lift coefficient.
但是，旋转速度不变的情况下增加球速会降低升力系数。
2
The string bed in a longer frame generates more spin due to increased velocity.
因为较长的球拍可以产生较快拍头速度，所以给球的旋转也越强。
3
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.