腹腔镜前端有一个体积极微小的微距镜头，镜头后连接有特殊的摄像机，可以让外科医师在电视显示器上看到放大了的病人内部器官。
A laparoscope (a tiny telescope connected to a video camera) is inserted through the cannula, giving the surgeon a magnified view of the patient's internal organs on a television monitor.
透过底片的光线在放大机里通过一个镜头。
The light that is shone through the negative passes through a lens in the enlarger.
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