focusing camera mirror

例句：

1. 1.The camera is focusing on the subject.
   相机正在聚焦于主题。
2. 2. She focused all her attention on the task.
   她全神贯注地完成了这项任务。
3. 3. The photographer was trying to focus his lens.
   摄影师正试图调整他的镜头。