胸骨

例句：

1. 1. He was hit on the chest with a baseball bat and suffered a broken rib.
   他被棒球棒击中胸部，肋骨骨折了。
2. 2. The doctor examined his chest and found no signs of injury.
   医生检查了他的胸部，没有发现任何受伤的迹象。
3. 3. She lifted her arms above her head to show off her muscular chest.
   她举起双臂，展示她的强壮胸肌。