lens covering a wide angle of field

例句：

1. 1. The lens of the camera focuses light onto the film.
   相机的镜头将光线聚焦到胶片上。
2. 2. She focused her attention on the task at hand.
   她把注意力集中在手头的任务上。
3. 3. The lens of the telescope is a crucial part of the instrument.
   望远镜的镜头是仪器的关键部分。