lumbar muscle strain

例句：

1. 1. He injured his backin the gymnastics competition and suffereda lumbar muscle strain.
   他在体操比赛中受伤，腰部肌肉拉伤。
2. 2. Shehad to take time off work to recoverfrom a lumbar muscle strain.
   她不得不请了假来恢复腰部肌肉拉伤。
3. 3. The doctor advised him to restfor a few days and avoid any strenuous activities until the lumbarmuscle strain healed.
   医生建议他休息几天，避免任何剧烈活动，直到腰部肌肉拉伤痊愈。