集中注意力于

例句：

1. 1. She decided to concentrate on her studies after returning home.
   她决定回家后专注于学习。
2. 2. The teacher asked the students to concentrate on the lesson before moving on.
   老师要求学生们在继续之前先专注于课堂内容。
3. 3. The artist concentrated his efforts on creating a masterpiece.
   这位艺术家全神贯注地创作了一件杰作。