Services include the backhand topspin and backspin serves the forehand topspin and backspin serves and the high toss service.

发球方法包括，反手上旋球和下旋球，正手上旋球和下旋球。和高抛发球。

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Services include the backhand topspin and backspin serves, the forehand topspin and backspin serves, and the high toss service.

发球方法包括，反手上旋球和下旋球，正手上旋球和下旋球。和高抛发球。

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Once you've developed a sound service motion, it's important that you toss the ball into the same spot each and every time.

一旦你形成了良好的发球姿势，那么要做到每一次都将球抛到相同的位置，这一点非常关键。

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The service toss goes astray.

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