这就需要用产生一个力- - -称为马格努斯效应- - -的侧旋，以引发球轨道的弯曲。
This is done by applying side spin, which generates a force - called the Magnus force - that causes the ball's trajectory to bend.
这就需要用产生一个力- - -称为马格努斯效应- - -的侧旋，以引发球轨道的弯曲。
This is done by applying side spin, which generates a force - called the Magnus force - that causes the ball's trajectory to bend.
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