ossa cruris

例句：

1. 1.The patient's condition worsened after the surgery.
   手术后，患者的病情恶化了。
2. 2. He was hit in the chest by a flying object.
   他被飞来的东西击中了胸部。
3. 3. She lifted her arms to show off her new tattoos.
   她举起手臂来炫耀她的新纹身。