primary bronchus的用法和樣例：
例句
- Four days after seeding, the graft was used to replace the patient's left main bronchus.
種植完成四天後，該移植物被用來替換患者的左主支氣管。 - Conclusions Resection and reconstruction of tracheal carina and main bronchus may increase resection rates of central type lung carcinoma and achieve excellent long-term survival.
結論氣管隆突主支氣管切除成形手術提高了中心型肺癌的手術切除率，並取得滿意的治療效果。
