专注

例句：

1. 1. She focused her attention on the task at hand.
   她把注意力集中在手头的任务上。
2. 2. The teacher asked us to focus on the lesson and not be distracted by our phones.
   老师让我们专注于课程，不要被手机分心。
3. 3. He focused his energy on finishing the report before deadline.
   他集中精力在完成报告之前，以免错过截止日期。