pulmonary trunk

例句：

1. 1.The pulmonary trunk is the main blood vessel that carries oxygenated blood from the heart to the lungs.
   肺动脉干是输送氧气化血液从心脏到肺部的主要血管。
2. 2. During surgery, the surgeon must carefully dissect the pulmonary trunk to avoid damaging the lung tissue.
   在手术中，外科医生必须小心地解剖肺动脉干以避免损伤肺部组织。
3. 3.The patient's condition worsened, and the doctor had to perform emergency surgery on the pulmonary trunk.
   患者的病情恶化了，医生不得不对肺动脉干进行紧急手术。