But stressed constantly the approach speed use factor the enhancement caused the approach speed to surpass the controllable scope, brought the disadvantageous influence to the takingoffspeed change.
而一味强调助跑速度利用率的提高使助跑速度超出了可控范围，对起跳速度变化带来不利的影响。
2
Swinging leg should actively swing forward after takingoff the board to lower horizontal speed loss and improve the jumping speed.
摆动腿蹬离地面后积极前摆对加快起跳腿的下压着板、减少水平速度损失、获得较大的腾起初速度有利。
3
Highly developed capillary structure, absorb the capacity tallly , suck, takingoff the speed of enclosing quickly, it is effectual to purify.