本实用新型是一种教学用无尘黑板擦器，由把手、胶皮壳、擦器主体、擦器壳和擦器组成。

The utility model relates to a dust-free blackboard eraser for teaching, which is composed of a handle, a rubber sheet housing, an eraser body, an eraser housing and an eraser.

都都: 你需要黑板擦.

DuDu: You need an eraser.

都都：你需要黑板擦。

Dudu: you need an eraser .

把黑板擦了, 王大伟.

Clean the blackboard, Wang Dawei.

在老师的桌上有一块黑板擦。

On the teacher's desk there's an eraser.

你可以用黑板擦把粉笔印擦掉。

You Can rub out the chalk marks with the eraser.

汤姆：好的。我的黑板擦完了。

Tom: OK, I've finished cleaning the blackboard.

艾丽娜，留下来把黑板擦干净。

Eiina , stay behind and wipe down the blackboard.

老师建议我们课后把黑板擦了.

The teacher suggested that we ( should ) clean the blackboard after class.

老师掸掉黑板擦上的粉笔灰.

The teacher beat chalk dust from erasers.