n.抹布；除尘器；宽松服；防尘衣；尘暴
That duster is very dirty. 那个掸子很脏。
She went over the room with a duster. 她用抹布把房间擦得干干净净。
The girl went over the room quickly with a duster. 女孩用掸帚很快地把房间清理了一下。
聚类
n.指节铜套
