fine powdery material such as dry earth or pollen that can be blown about in the airthe remains of something that has been destroyed or broken up同义词：debris, junk, rubble, detritusfree microscopic particles of solid material
动词 dust:
remove the dust fromrub the dust over a surface so as to blur the outlines of a shapecover with a light dusting of a substancedistribute loosely同义词：scatter, sprinkle, dot, disperse
例句：
She moistened a tissue and gently wiped the dust off the necklace.她沾湿了一块纸巾，轻轻擦去项链上的灰尘。A filter traps dust from the air.过滤网可存住空气中的尘埃。The dust made him sneeze.灰尘使他打了个喷嚏。He rose again from the dust of past defeats.他过去因失败而蒙羞，现在东山再起了。Please dust all the books on the bottom shelf.请把底层书架上的书都掸一掸。The car raised quite a dust as we drove off.我们走时车子扬起了一阵尘土。
详细解释：
dustn.（名词）Fine, dry particles of matter.灰尘：细而干的物质颗粒A cloud of fine, dry particles.粉尘：尘雾状细干颗粒Particles of matter regarded as the result of disintegration:尘埃：被认为是粉碎而成的物质颗粒：例句：fabric that had fallen to dust over the centuries.经过几百年的时间已化为粉末的织物Earth, especially when regarded as the substance of the grave:坟土：土地，尤指被视为坟墓时的土：例句：.ashes to ashes, dust to dust.(Book of Common Prayer).尘归尘，土归土.(大众祈祷者必读)The surface of the ground.地面A debased or despised condition.卑微或受鄙视的状态Something of no worth.无价值的东西Chiefly British Rubbish readied for disposal.【多用于英国】 要被弃置的废物Confusion; agitation; commotion:混乱；搅乱； * ：例句：won`t go back in until the dust settles.等骚乱平定了再回去v.（动词）dust.ed,dust.ing,dusts v.tr.（及物动词）To remove dust from by wiping, brushing, or beating:除去灰尘：擦，刷或敲打以除去灰尘：例句：dust the furniture.抹去家具上的灰尘To sprinkle with a powdery substance:撒粉末于：例句：dusted the cookies with sugar; dust crops with fertilizer.将饼撒上糖粉；把化肥撒在作物上To apply or strew in fine particles:擦粉状物：以细颗粒形式使用或散布：例句：dusted talcum powder on my feet.在我的脚上撒爽身粉Baseball To deliver a pitch so close to (the batter) as to make the batter back away.【棒球】 发近身球：向击球手发近身球，以使其向后退v.intr.（不及物动词）To clean by removing dust.除尘To cover itself with such particulate matter. Used of a bird.用沙尘洗澡。指鸟<常用词组>dust offTo restore to use:重新使用：例句：dusted off last year`s winter coat.重又穿上去年的冬衣<习惯用语>in the dustFar behind, as in a race or competition:落后：落后，如在赛跑或竞争中落后于人：例句：a marketing strategy that left our competitors in the dust.把我们的竞争对手远远地抛在后面的市场策略make the dust flyTo go about a task with great energy and speed.干得起劲：以极大的精力和速度做某项任务来源：Middle English 中古英语 from Old English dôst 源自 古英语 dôst