endoscopic cold light source

例句：

1. 1. The surgeon used an endoscopic coldlight source to perform the surgery.
   外科医生使用内窥镜冷光源进行手术。
2. 2.The patient was given a cold light sourceto help him see clearly.
   患者被给予一个冷光源，帮助他看得更清楚。
3. 3. The doctor used the endoscopic coldlight source to examine the patient'seye.
   医生使用内窥镜冷光源来检查患者的眼。