spacing signal

例句：

1. 1. The book is spacing out as I read it.
   我读这本书时，它开始离我越来越远。
2. 2. The teacher asked the students to space their desks apart.
   老师要求学生们把桌子拉开一些距离。
3. 3. The two cars are spacing off on opposite sides of the road.
   两辆车在路的两侧分开了。