But the operation was not going smoothly. Schwarz's endoscope kept bumping into ice crystals that blurred the camera lens.
但是整个的操作进行得并不顺畅，施瓦茨的内诊镜总是碰撞进冰晶里面弄糊摄影机镜片。
2
An endoscope (which contains a surgical light and small camera) is placed through the tube, allowing the surgeon to view the annulus, disc, and epidural space on a video monitor.
This system consists of fourmain parts, namely, the endoscope, the optical links including four rigid guide tubes for theimage transfer lens, the photographic adapter and the camera.