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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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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A damage of cartilaginous cell and joint structure of arm bone of the newborn mice was observed in high dose fluoride group.

在高剂量组子鼠的上肢骨切片中可见软骨细胞和关节结构的破坏。

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The reason for the dose of caution is due to the skeleton being incomplete, with just one upper arm bone, and six vertebrae being recovered.

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However, the team behind the work has stopped short of definitively calling N parringtoni the earliest dinosaur, because the fossil skeletons used to define it were incomplete: one upper arm bone and six vertebrae.

BBC: New contender for oldest dinosaur

In one grisly incident in April 2009, mortuary workers were ordered to saw off the arm bone of a deceased soldier in order to fit his body into a military uniform for burial, in accordance with the wishes of his family.

BBC: Dover Air Force Base 'lost US troop remains'