rotary erase timing

例句：

1. 1. The rotaryerase timer is used to quicklyclean up messes on the computer screen.
   旋转擦除定时器用于快速清理电脑屏幕上的混乱。
2. 2. The rotary erasetimer is a useful tool for teacherswho need to quickly clear their screensduring lessons.
   旋转擦除定时器是教师在课堂上需要快速清除屏幕时的一个有用的工具。
3. 3. The rotary erasetimer is also commonly used in schoolsto help students learn how to use computersmore effectively.
   旋转擦除定时器在学校中也常被使用，帮助学生更有效地学习如何使用计算机。