腾空

This Ski Trick is a backward somersault in the air.

此滑雪动作是指在腾空时向后空翻。

The results were as follows.(1) In the backward handspring, the trajectory of CM and horizontal velocity of CM in junior-high and college gymnasts were lower and higher than those of senior-high gymnast, so the vertical velocity is better when they perform tucked backward somersault. College gymnast has higher vertical velocity than junior-high and senior-high gymnasts in take-off moment of backward handspring phase.(2) Senior-high and college gymnasts have more elbow and shoulder angle in take-off moment of backward handspring and tucked backward somersault phase. Therefore, angle of both arm is bigger for performing in hand push away phase in the backward handspring, and increased the reaction force with body in the tucked backward handspring.(3) College gymnast has large knee flexions in hand support and push away moment in the backward handspring, it would increase rotation radius and better moments of inertia in the backward handspring.

结果显示：在后手翻阶段中，较低的重心轨迹和较高的水平速，有於后续空翻的垂直速；大专选手在后手翻阶段起跳瞬间有较高的垂直速；高中及大专选手在后手翻起跳脚地瞬间和团身后空翻起跳脚地瞬间时，肘、肩关节角皆大於国中选手，使其在后手翻起跳地瞬间时，双臂的伸展於后手翻的手推地面的动作，而团身后空翻起跳脚地时，双臂向上摆於身体向上伸展方向的掌握，并使重心有一定的腾空高；大专选手在后手翻阶段的手著地瞬间和手地瞬间的膝关节角较大於高中和国中选手，使其可增加身体的旋转半径，并能获得较佳的下摆动能，而膝关节角小则形成屈膝的动作，导致重心水平速低，减少下摆动能和影响整体动作的节奏和韵。

I will clear the drawer so that you can put your belongings in it.

我会把这个抽屉腾空，这样你就能把你的东西放进里面了。

I will make this drawer empty, so that you can bring your things into it.

我会把这个抽屉腾空，这样你就能把你的东西放进里面了。

The result shows that the technical style of our athletes used is that stride length is shorter and stride frequency is larger,the buckjump time of our players is located at the floor level of the foul limit,the knee angel is unwind from touchdown on upright phase,in the sprint phase,the kneel angel is blurry from touchdown to upright phase,the uprightness displacement of body center and vertex are higher than the international athletes, this since stretching to leave a ground of opportune moment to be partial to early and making an effort action insufficiency with leg driving of the ankle joint relevantly, also with the leg put of front stretch is not enough active at the touchdown ground moment.

结果表明，我国运动员在后半程中，运用的是步长较短，步频较快的技术风格；腾空时间总体上处于犯规时限的下限，膝关节从着地瞬间直至垂直支撑面保持了可见的伸直状态，但在最后冲刺阶段，膝角出现了模糊伸直过程；身体重心垂直位移、头顶位置上下起伏均高于世界优秀运动员平均水平，这既与踝关节后蹬伸展离地时机偏早、用力动作不充分有关，也与着地瞬间摆动腿前摆后的前伸着地动作不够积极有关。

I will clean out the drawer ,so you can put your things in

我会把这个抽屉腾空，这样你就能把你的东西放进里面了。

I'll clear out this drawer and you can put your things in it.

我会把这个抽屉腾空，这样你就能把你的东西放进里面了。

I will clear out my drawer so that you can put your things in it.

我会把这个抽屉腾空，这样你就能把你的东西放进里面了。

That is after you explode up-wards you suck-up the bike towards your body.

兔跳"与简单的"腾空"技巧是不同的，如果动作里包含"兔跳"和"腾空"，身体就会像弹簧一样的活动，压载弹簧然后弹开弹簧。"

Before you hop, get your weight back and compress down, then you launch your weight up and forward, think of surging forward to launch your body.

兔跳&与简单的&腾空&技巧是不同的，如果动作里包含&兔跳&和&腾空&，身体就会像弹簧一样的活动，压载弹簧然后弹开弹簧。&

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。