Two muscles, the infraspinatus and teres minor, connect the shoulder blade to the upper arm bone and roll the arms outward.

冈下肌和小圆肌这两块肌肉，将肩胛骨和上臂连接起来，使手臂外旋。

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The team found that two of the wing bones showed evidence of combat, including a fractured hand bone and a centimeter-thick upper arm bone that was broken in half.

研究小组发现的两个翅骨带有争斗留下的痕迹。其中一个是手骨，已经骨折，另一个是1厘米厚的上臂骨，已经断为两截。

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Primate arms have one long bone, the humerus, in the upper arm above the elbow, and two thinner bones, the radius and ulna, in the forearm.

灵长类的上臂有一根长骨（肱骨），前臂有两根细骨（尺骨和桡骨）。

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Primate arms have one long bone, the humerus, in the upper arm above the elbow, and two thinner bones, the radius and ulna, in the forearm.

灵长类的上臂有一根长骨（肱骨），前臂有两根细骨（尺骨和桡骨）。

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