knee brace

例句：

1. 1. He wore aknee brace to protect his injured knee.
   他戴着膝盖护具来保护他的受伤膝盖。
2. 2. The doctor recommended that she weara knee brace for her surgery.
   医生建议她做手术时戴上膝盖护具。
3. 3.She put on the knee brace andstarted walking again.
   她穿上膝盖护具，又开始走路了。