dust1/dʌst; dʌst/n [U] very small bits of dirt or soil that look like a powder 沙尘﹐尘土: The furniture was covered in dust . 家具上积满了灰尘。a thick layer of dust on the table 桌子上厚厚的一层灰尘a speck of dust 一粒灰尘The car drove off in a cloud of dust . 汽车扬起一片尘埃开走了。
dust2v [I,T] to clean the dust from something with a cloth 擦去(…的)灰尘: He dusted the shelves. 他擦去了架子上的灰尘。dust sth off phr v to remove dust, dirt etc from something by brushing it with your hands〔用手〕除去…的灰尘﹐擦净: He dusted off the crumbs. 他拂去面包屑。dust yourself off He got to his feet and dusted himself off. 他站起来拍去身上的灰尘。