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。

youdao

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。

youdao