eraser

彰化縣埔心鄉太平國小 

The students are cleaning the board with an eraser. 

學生們正在用板擦擦黑板。

They then clean the eraser with a cleaning machine. 

然後他們用板擦機清潔板擦。

彰化縣竹塘鄉竹塘國小

The students use erasers to erase the blackboards. 

學生們用板擦擦黑板。

They hit the erasers with a stick to clean them. 他們用棍子打板擦來清板擦。