1. Doctors used an endoscope to examine the patient's digestive system.
医生使用内窥镜检查患者的消化系统。
2. The endoscope allows surgeons to visualize and operate on internal organs without the need for invasive surgery.
内窥镜使外科医生能够在无需侵入性手术的情况下可视化和操作内部器官。