side spin

基本解释

Probably the hardest technique to employ successfully - even experienced professionals have difficulty judging it - is side spin.
有一种技术可能是最难以成功应用的技术——即使是经验丰富的职业球员，也很难判断。这就是侧旋。
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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。
Side spin is used for a number of reasons, but its main job is to change the angle the cue-ball bounces off the cushion after hitting the object ball.
使用侧旋可以是出于很多种原因，但是最主要的一点就是改变母球离开目标球之后再吃库时的反射角度。
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