... backspin chop 削下旋球 forehand backspin service 发正手下旋球... backspin rolls 传动托辊 ...
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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。
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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