Jumping is grasping the chance to get the quickest vertical speed and reasonable jumping angel with powerful pressing and stretching.
跳段是把握蹬伸时机，以强有力的蹬伸获取尽量大的垂直速度和合理的腾起角度。
Conclusions: At the gliding stage, Cheng Xiao-yan the swing legs vertical speed too high, level speed too smell and the enlarging angel of body gravity ;
结论：程晓燕在起滑时左腿摆动垂直分速过大，水平分速相对较小，重心腾起角增大；
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