shoulder joint

Researchers can precisely measure previously unquantifiable aspects of pitching—everything from the angular velocity of the arm at the shoulder joint to tension on the knees and elbows.

研究者可以精确地测量出先前无法量化的各种有投球方面的数据——从节部位手臂移动角度的速度，膝盖和手肘的张力。

Periarthritis of shoulder joint can be called frozen shoulder also,is a kind of disease having no clear and organic pathologic change with shoulder ache and hypoactivity as characteristic.

周炎是以节疼痛的和活动障碍为特征的常见病。对周炎治疗的差异较大,其效果也不一致。