1.Pronation is an advanced serve technique, but it lies at the core of every single college and professional-level serve.
内旋属于发球的高级技术，当时也是美国职业选手或大学选手发球的核心之一。
2.Pronation results in turning the thumb toward the body , supination in turning the fifth finger toward the body .
手掌向下导致拇指朝向身体，手掌向上导致小指朝向身体。
3.Forearm pronation is movement of the forearm causing the hand to be positioned in a "palm down" posture.
前臂旋前就是前臂做了个使掌心向下的动作。
4.This entirely normal inward rolling is called pronation.
这种完全正常的向内翻转称为“内翻”。
5.The function of the arm and elbow joint was remarkably unaffected with nearly full extension and flexion, supination and pronation.
的职能部门和肘关节明显影响几乎全面推广和屈曲，旋和旋。
6.Therefore we must bring the hand into a horizontal position with its palm down; this is done by pronation.
所以我们必须将手掌向下使手掌处于一个水平位置；只要将手掌向下就行了。
7.Conclusion Pronation reduction is an effective treatment for radial head subluxation.
结论旋前复位法是有效的桡骨小头半脱位的复位方法。
8.Raise your upper arm slightly, and the extreme tension caused by an excessive pronation will disappear.
轻轻举起你的上臂，由于手掌过度向下引起的肌肉极度绷紧张力将会消失。
9.Methods: Computed tomography scans of forty-five asymptomatic wrists were performed with the hand in supination, neutral, and pronation.
方法：应用CT在旋后位、中立位及旋前位扫描45个腕关节无症状人的手。
10.Also, at the end of the article, we explain Pronation--a biomechanics term that often confuses runners.
在文末，我们还将解释一个困扰许多跑步者的生物力学名词——“脚内翻”。