Pars basilaris

例句：

1. 1.He was hit on the chest by abaseball and had to be taken to thehospital.
   他被棒球击中胸部，不得不被送往医院。
2. 2. Thedoctor performed a sternotomy to repair his broken ribs.
   医生进行了胸骨切开术来修复他的骨折。