external nasal branch

例句：

1. 1. The external nasopharyngeal branch is responsible for carrying blood from the nose to the brain.
   外部鼻分支负责将血液从鼻子输送到大脑。
2. 2. During surgery, the surgeon must carefully dissect the external nasal branch to avoid damaging the nerves.
   在手术中，外科医生必须小心地解剖外部鼻分支，以避免损伤神经。
3. 3.The patient's condition worsened after the external nasal branch was blocked by a foreign body.
   患者的病情在外部鼻分支被异物阻塞后恶化了。