compages of thorax

例句：

1. 1.The doctor performed a surgery on the patient's thorax.
   医生为病人的胸骨进行了手术。
2. 2. The sternum is the main bone of the chest.
   胸骨是胸腔的主要骨头。
3. 3. The patient was lying on his back with his arms by his sides.
   病人平躺在地上，双臂放在身体两侧。