focuser

例句：

1. 1. Theteacher focused the class on the main ideaof the text.
   老师把全班的注意力集中在文本的主要观点上。
2. 2. The student focused hisattention on the task at hand.
   学生把注意力集中在手头的任务上。
3. 3. The artistfocused his brush on the canvas to createa masterpiece.
   艺术家用画笔在画布上创作出一幅杰作。