右手臂与手肘要与身体分离同时也要保持在胸口的前方，这麽做可以增加挥杆速度。
The right elbow is away and in front of the body, which creates leverage and speed.
并实现了播放速度控制、关键帧分析、挥杆分析等的设计。
Furthermore, it expounds how to design the control of play speed, the analysis of key frame and the motion of the cue.
并实现了播放速度控制、关键帧分析、挥杆分析等的设计。
Furthermore, it expounds how to design the control of play speed, the analysis of key frame and the motion of the cue.
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