They scrape their knee, they have a big test coming up, they're going through puberty.

他们有时候会摔伤膝盖，有大考来临，会经历青春期。

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The sure-fire test for runner's knee: sit down and put your leg out on a chair so that it's stretched out straight.

确诊的方法：坐下来，将一条腿伸直放在椅子上。

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Objective To investigate clinical value of diagnostic blocking test of knee joint for diagnosis and treatment of knee osteoarthritis complicated with degenerative lumbar disease.

目的探讨膝关节封闭试验在膝关节骨关节炎合并腰椎退变性疾病的诊断及治疗中的应用。

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Nel will be replaced by Dale Steyn or Makhaya Ntini, who has had a cortisone injection in his knee and faces a test to decide if he can rejoin the tour.

BBC: SPORT | Cricket | Nel faces lengthy injury lay-off

The first came through West Ham midfielder Jack Collison who started after passing a late fitness test on a knee injury.

BBC: Wales 0-1 Sweden

For Stoudemire, who has a history of knee problems, the biggest test now will be to build on his health and performance.

WSJ: New York Knicks: This May Take Some Time