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TOEFL IELTS BNC: 3576 COCA: 4370

filter

Word family 
Related topics: Technology, Motor vehicles, Computers
fil·ter1 /ˈfɪltə $ -ər/ ●●○ noun [countableC]   → philtre
1  TSEPARATEsomething that you pass water, air etc through in order to remove unwanted substances and make it clean or suitable to use 过滤器
water/air/oil etc filter
 a pond filter
池塘过滤器
 coffee filter papers
咖啡滤纸
 filter cigarettes (=with a filter at the end)
过滤嘴香烟
2  Ca piece of equipment or computer program that only allows certain sounds, images, signals, types of information etc to pass through it 〔只允许特定声音、图像、信号、信息等通过的〕过滤器，过滤程序
 a UVA light filter
长波紫外线滤光器
 The firm uses electronic filters to prevent workers from accessing the Internet.
该公司利用电子过滤器来防止员工上网。
3. British EnglishBrETTC a traffic light that shows car drivers when they can turn right or left 〔指示汽车司机左转或右转的〕分流转弯信号灯
Examples from the Corpus
filter• FiltrationA filter is of great help in keeping water free of suspended material, but it does not alleviate a polluted condition.• An interference filter consists of two thin-silvered pieces of glass which are semitransparent.• Two small filters can be easier to hide than one large one.• The filter was constructed as shown in the diagram and then stood on the wooden crosspieces on top of the vat.• If I build a trickle filter, holding approximately 10 gallons, will I be able to increase my stocking level?• Marine Answers Increasing the stock I have a 34 gallon set up with an undergravel filter and external canister filter.• a water filter• The bi-word filter eliminated some possibilities but was not good enough to find a single interpretation.
water/air/oil etc filter• Are you interested in a plumbed-in water filter or would a table-top model suit you better?• I mean. Air filters are, air filters are not one of our best selling items.• However, portable water filters provide another simple alternative.• The remote oil filter pipes rubbed against the sharp edge of the battery bracket.• And it comes with a removable air filter, an extra long cable, fitted plug and a two year guarantee.• The remains of the air filter system was fitted facing the rear bulkhead.• Pardue's aircraft had metal on the oil filter screens as well as part of a piston ring.
Related topics: Motor vehicles
filter2 ●○○ verb  
1  [transitiveT]SEPARATE to remove unwanted substances from water, air etc by passing it through a special substance or piece of equipment 过滤
 The water in the tank is constantly filtered.
鱼缸里的水在不停地被过滤。
 The ozone layer filters harmful UV rays from the sun.
臭氧层过滤掉有害的太阳紫外线。
2  [intransitiveI always + adverbadv/prepositionprep]MOVE something OR somebody if people filter somewhere, they move gradually to that place 〔人群〕逐渐移动，逐渐走过
 Chattering noisily, the crowd began to filter into the auditorium.
人群叽叽喳喳地说着话，慢慢步入会堂。
3  [intransitiveI always + adverbadv/prepositionprep]FIND OUT if news, information etc filters somewhere, people gradually hear about it from each other 〔消息、信息等〕慢慢传开，走漏，泄漏
 The news gradually filtered through from Bombay last night.
昨晚消息渐渐从孟买传开了。
4  [intransitiveI always + adverbadv/prepositionprep]C if light or sound filters into a place, it can be seen or heard only slightly 〔光线或声音〕隐约地透过，隐约地传入
 Moonlight filtered in through the frosted window.
月光透过磨砂玻璃窗隐约照射进来。
 The familiar notes of Beethoven’s ‘Für Elise’ filtered from the bar.
贝多芬《致爱丽丝》那熟悉的旋律从酒吧传来。
5. [intransitiveI, transitiveT] British EnglishBrETTC if traffic filters, or if a system filters it, cars can turn left or right while other vehicles going straight ahead must wait （使）〔车辆〕分流转弯〔直行的车辆必须等待〕
6 filter something ↔ out phrasal verbphr v 
a) SEPARATEto remove something, using a filter 〔用过滤器〕滤除，滤掉
 The pump filters out mud.
这台泵滤掉泥浆。
b) to remove words, information etc that you do not need or want 滤除〔不需要的单词、信息等〕
 Net users can filter out unwanted emails with software.
网络用户可以使用软件过滤掉不想收到的电子邮件。
Examples from the Corpus
filter out• Once convinced it is easy to filter them out.• They have variable suction for cleaning delicate curtains, as well as thick carpet, and filters that take out allergens as well as dust.• Each spectacle lens then filters one image out, based on its color or polarity.• Don't filter them out because they seem silly, and don't be afraid of being wrong.• The overflow connection should have a filter to keep out insects and an internal dip tube to prevent icy draughts.
Examples from the Corpus
filter• Memory was mischievously selective at the best of times Trivia stuck limpet-like and the useful filtered away.• That software can filter either e-mail or Usenet postings.• In remote areas, you will need to filter or boil your drinking water.• These used rotating discs to initiate a quasi-musical sound which was then filtered, processed and reproduced at different pitches.• These firms know what the local law is, and could filter some Internet content as demanded by it.• When they are exhaled they are filtered through the white crystals of soda lime, and a bacterial filter.
Origin filter1
(1300-1400) Old French filtre “piece of felt (= thick material) used as a filter”, from Medieval Latin filtrum
fil·ter1 nounfilter2 verb
Chinese
Syllable
Corpus
TOEFL IELTS BNC: 3576 COCA: 4370
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。
TOEFL IELTS BNC: 3576 COCA: 4370

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