脸朝地板向下，肘关节弯曲，手心靠近肩膀。
Lie face down on the floor with your elbows bent and your palms next to your shoulders.
虽然从通常意义上讲，当一个人说到手肘的时候，他所指的常常是肘关节尖端的那一小部分，也就是手臂弯曲处的外侧。
In common parlance though, when someone mentions the elbow they usually mean the pointy bit; the outside of the arm bend.
实验结果表明：人体和猕猴肘关节在发生扭转和弯曲损伤时所承受的平均载荷传递比分别为3．65和4．28。
The results show that the mean load transfer ratios between human and rhesus monkey elbow joints were 3.65 and 4.28 for torsional and bending injury respectively.
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