Sometimes he loses balls he shouldn't lose but when you look at the end of the game he has always had a big impact.

有时他会丢一些不该丢的球，但是当比赛结束再来审视他的发挥时你会发现他对比赛的影响是有多大。

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Impact work of grinding ball depends on the diameter and revolutions of mill, the release Angle, diameter and materials of balls.

磨球的冲击功与球磨机直径、转速、脱离角、磨球直径和材质有关。

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A similar effect occurs with golf balls, which always have "backspin" from impact with the slanted club face.

球棒斜面打击高尔夫球时，常发生“后旋”，就是这种类似效应。

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Beckham was seen jogging in Dubai and also spent time on a mini-trampoline, enabling him to bounce on his left foot to cushion the impact while kicking balls with his right foot.

BBC: Eriksson backs Beckham

More recently, it has been looking into various ways, including reduced-distance balls, to reduce golf's environmental impact.

WSJ: Why a Ball Rollback Might Not Fly | Golf Journal by John Paul Newport

Labour's shadow chancellor Ed Balls said there was a debate to be had about the relative impact austerity had had on growth but David Cameron "must be living on another planet if he thinks spending cuts and tax rises have had no impact at all".

BBC: UK Politics