A survey of knee injury of college PE teachers shows that injury of knee is common among them, especially kneecap strain. This paper deals with the causes of kneecap strain and possible treatment.

文章通过对高校体育教师膝关节损伤情况的调查研究，发现体育教师是膝关节损伤的高发人群，且以髌骨劳损居多，分析原因并提出康复治疗的手段方法。

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"Recent scans confirm an injury to the right knee with bone bruising and possible cartilage damage to the kneecap, " the ECB said in a statement.

WSJ: Pietersen Quits Tour With Knee Injury