The knee brace harvests energy generated when someone bends their knee to take a step.

当人屈膝迈步时，膝行拉条会储存能量。

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Doctors have advised Nadal now to take a few days' rest. He has a sore knee.

建议Nadal休息几天，因为他患有膝关节痛，不能参加本周在德国举行的梅赛德斯杯比赛。

youdao

How is your knee? How long do you think it will take for a full recovery?

你的膝盖怎么样了？你觉得要完全恢复还需要多长时间？

youdao

So, no, we were not going to take a knee and do nothing.

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Revis, recovering from a torn knee ligament, is expected to take a physical after he arrives at the Buccaneers' facility.

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Innovations could take a system that requires sixty-three clinicians for a knee replacement and knock the number down by half or more.

NEWYORKER: Big Med