后弯

This phenomenon has key implications in the progression of infant and juvenile musculoskeletal deformities, such as adolescent idiopathic scoliosis, hyperkyphosis, genu varus/valgus and tibia vara/valga, as well as neuromuscular diseases.

这种现象有一个重要的暗示存在于婴儿和青少年骨骼肌肉畸形，例如青少年特发性脊柱侧凸，脊柱过度后弯，膝关节内翻/外翻，胫骨内翻/外翻和神经肌肉疾病。

The calculation results shows that ,(1) when the rotor rotates at the working speed, a local regurgitant whirlpool that is rightabout to the rotor"s rotating direction appears in the classifying region, which makes the separated granules come back to the outside of the classification district and influences the classification efficiency of the turbine classifier;(2) in the condition of a low rotating speed of turbo rotor, ultrafine particles can follow the gas phase by and large, but when the rotating speed increases, a phenomenon of velocity slippage between two phases appears evidently;(3) A operating parameter, air flow rate is so important that can directly influence the stability of flow field in classifying chamber, the bigger the air flowrate is , the steadier the flow field is;(4) Compared with straight blades, the new shape of blades with backward crooked elbow are helpful to improve the stability of flow field and form whole stream easily, also beneficial to advance the classification accuracy and classification efficiency;(5) The motion trace of particles are very complicated when the turbo rotor rotates at a high speed, the constant bounce of the particles appear between the blades and the coarse particles are even bounce back from the inlet, only the finer can pass through the classification area from the oulet;(6) Along with the increase of the rotor"s rotating speed, radiah axial and tangential velocity all begain to fluctuate repetitively like sine-wave, the smaller the particles are, the more violently they fluctuates.

数值模拟结果表明，(1)在涡轮达到工作转速时，在分级区域形成了一个与涡轮旋转方向相反的局部回流涡，它使得分离出来的细粒重又被带回分级轮外边缘，从而严重影响分级机的分级效率；(2)粉尘粒子在涡轮低速运动情况下，基本上能跟随气体运动，但随着转速加大，两相之间出现了明显的速度滑移现象；(3)分级机工作时的风量也是一个比较重要的操作参数，它可以直接影响到分级机内腔流场的稳定性，风量越大，流场越稳定；(4)同直叶片形状相比较，带后弯导板的叶片，有利于改善流场的稳定性，流场容易形成整体流，对提高分级效率和分级精度都非常有利；(5)粒子轨迹线在涡轮转速较高时十分复杂，有的出现了反复的弹跳现象，大颗粒不能通过分级区域而从进口返流了，只有细小的颗粒才从出口处流出；(6)涡轮转速加大时，粒子的径向、轴向和切向速率出现了明显的类似于正弦波的脉动现象，颗粒越小，脉动程度越为剧烈。

Poses that open the front of the legs, such as lunges, virabhadrasana 1 and sputa virasana are good preparation for backbends.

打开腿部前侧的体式，例如起跑式，战士一式以及卧英雄式，是很好的后弯准备体式。

Trade; Poses that open the front of the legs, such as lunges, virabhadrasana 1 and sputa virasana are good preparation for backbends.

打开腿部前侧的体式，例如起跑式，战士一式以及卧英雄式，是很好的后弯准备体式。

Poses that open the front of the legs,列 such as lunges,凼 virabhadrasana 1 and sputa virasana are good preparation for backbends.

打开腿部前侧的体式，创例如起跑式，刣战士一式以及卧英雄式，刊是很好的后弯准备体式。切

Poses that open the front of the legs,凐 such as lunges,凗 virabhadrasana 1 and sputa virasana are good preparation for backbends.

打开腿部前侧的体式，凷例如起跑式，刎战士一式以及卧英雄式，凹是很好的后弯准备体式。凹

Poses that open the front of the legs,击 such as lunges,划 virabhadrasana 1 and sputa virasana are good preparation for backbends.

打开腿部前侧的体式，凹例如起跑式，凡战士一式以及卧英雄式，凝是很好的后弯准备体式。凮

With your other hand, lift the chin so the head tilts back.

用另一只手抬起患者下巴，让患者颈部向后弯。

For example, you should have an idea of how practicing backbends before inversions feels and vice versa.

例如，你需要明白在倒立之前练习后弯的感觉，反之亦然。

The picture to the right is her backbend after one year.

右边的图是她练习后弯一年后的效果。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。