板刷

例句：

1. 1. She uses a blackboard brush to clean the blackboard every day.
   她每天用黑板刷清洁黑板。
2. 2. The teacher needs a blackboard brush to write on the blackboard.
   老师需要一块黑板刷来在黑板上写字。
3. 3. After class, the students use blackboard brushes to clean the blackboard.
   课后，学生们使用黑板刷来清洁黑板。