wedge focusing

例句：

1. 1.The team used a wedge to help them focus on the task at hand.
   团队使用一个楔子来帮助他们专注于手头的任务。
2. 2.The photographer focused the lens with the wedge in his hand.
   摄影师用手中的楔子调整镜头焦距。
3. 3.The scientist used a wedge to help him concentrate on the experiment.
   科学家用一个楔子帮助他集中注意力于实验。