knee-brace

例句：

1. 1. He wore a knee brace to protect his injured knee.
   他戴着膝盖护具来保护他的受伤膝盖。
2. 2.She needed a knee brace for her surgery.
   她需要一副膝盖护具进行手术。
3. 3. The doctor recommended him to wear a knee brace while he recovers from the injury.
   医生建议他在恢复期间戴上膝盖护具。