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TOEFL IELTS BNC: 3576 COCA: 4370
filter

verb

filter ♦︎ purify ♦︎ refine ♦︎ strain ♦︎ sieve ♦︎ siftThese words all mean to separate sth from sth else, especially a solid from a liquid or larger solids from smaller solids. 这些词均表示过滤、筛。PATTERNS AND COLLOCATIONS 句型和搭配◆to filter / strain / sieve / sift sth into sth◆to filter / strain / sieve sth through sth◆to filter / purify air / water◆to refine / sieve / sift sugar◆to sieve / sift flour◆to be finely sieved / sifted■ filter [transitive] to pass a substance or light through a special device, especially to remove sth that is not wanted 过滤（物质或光线）◆All drinking water must be filtered.所有饮用水必须经过过滤。◆Use a sunblock that filters UVA effectively.使用能有效滤掉长波紫外线的防晒霜。◆The air was improving as the recyclers filtered out the smoke.由于循环净化器过滤掉了烟雾，空气质量正在改善。■ purify ˈpjʊərɪfaɪ; NAmE ˈpjʊrɪfaɪ [transitive] to make sth pure by removing substances that are dirty, harmful or not wanted 使洁净；净化◆One tablet will purify a litre of water in 10 minutes.一片即可在10分钟内净化1升水。◆House plants can help to purify the air.室内盆栽有助于净化空气。▸ purification ˌpjʊərɪfɪˈkeɪʃn; NAmE ˌpjʊrɪfɪˈkeɪʃn

noun

 [uncountable] ◆a water purification plant滤水厂■ refine rɪˈfaɪn [transitive] to make a substance pure by taking other substances out of it, especially as part of an industrial process 精炼，提炼，去除杂质（尤指作为一道工序）◆The process of refining oil produces several useful chemicals.炼油的过程会产生几种有用的化学品。■ strain [transitive] to pour food or another substance through sth with very small holes in it, for example a sieve, in order to separate the solid part from the liquid part 滤，滤掉（多余的水分）◆Use a colander to strain the vegetables.把蔬菜放在滤器里控控水。◆Strain off any excess liquid.滤掉多余的水分。■ sieve sɪv [transitive] to put sth through a sieve 筛；过筛；滤◆Liquidize or sieve half the soup and return it to the pot.把一半的汤打成浓汁或者滤一下，再倒回锅里。ⓘ A sieve is a tool for separating solids from liquids or larger solids from smaller solids, made of a wire or plastic net attached to a ring. The liquid or small pieces pass through the net but the larger pieces do not. * sieve指筛子、笊篱、漏勺等滤器。■ sift [transitive] to put flour, sugar or some other fine substance through a sieve or sifter 筛（面粉、糖或其他颗粒较细的物质）◆Sift the flour, baking powder and salt into a bowl.把面粉、发酵粉和盐筛到碗里。ⓘ In American English a sifter is a small sieve used especially for sifting flour. 在美式英语中，sifter尤指面粉筛子。

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