The first find was a humerus, or upper arm bone, of a giant ground sloth.

第一个发现是巨型树懒的肱骨，或上臂骨。

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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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The humerus is the long bone of the arm.

肱骨是上臂的长骨。

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At the hospital, the 74-year-old was diagnosed with a proximal humerus fracture -- the humerus being the upper bone of the arm.

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He was diagnosed with a proximal humerus fracture -- the humerus being the upper bone of the arm -- and as a result underwent what the Supreme Court said was reverse shoulder replacement surgery Saturday morning.

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