point micrometer

例句：

1. 1. The point of the map is to show the location of all the cities.
   地图的重点是显示所有城市的地理位置。
2. 2. The scientist made a crucial point about the importance of research.
   科学家强调了研究的重要性。
3. 3. The teacher pointed out the mistakes in the student's essay.
   老师指出了学生作文中的错误。