n.抹布；除塵器；寬松服；防塵衣；塵暴
That duster is very dirty. 那個撣子很臟。
She went over the room with a duster. 她用抹布把房間擦得干干凈凈。
The girl went over the room quickly with a duster. 女孩用撣帚很快地把房間清理了一下。
聚類
n.指節(jié)銅套
