filter

noun

/ˈfɪltə(r)/

/ˈfɪltər/

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enlarge image

a device containing paper, sand, chemicals, etc. that a liquid or gas is passed through in order to remove any materials that are not wanted滤器；过滤器
- an air/oil filter空气过滤器；滤油器
- a coffee/water filter咖啡过滤器；滤水器
- filter paper for the coffee machine咖啡机滤纸
- He smokes cigarettes without filters.他吸没有过滤嘴的香烟。
Topics Scientific researchc1
a device that allows only particular types of light or sound to pass through it滤光器；滤声器；滤波器
- The camera has an anti-glare filter.这种相机有防眩光滤光器。
(computing计算机) a program that processes information to leave out the types that are not wanted, or that stops particular types of electronic information, email, etc. from being sent to a computer筛选（过滤）程序
- Spam filters block out almost all threats.垃圾邮件过滤器可以屏蔽几乎所有的威胁。
Topics Phones, email and the internetc2
(British English) a light on a set of traffic lights showing that traffic can turn left (or right) while traffic that wants to go straight ahead or turn right (or left) must wait（交通红灯指示不得直行的同时，表示可左转或右转的）分流指示灯
- a filter lane分流车道。

词源late Middle English (denoting a piece of felt): from French filtre, from medieval Latin filtrum ‘felt used as a filter’, of West Germanic origin and related to felt.

filter

verb

/ˈfɪltə(r)/

/ˈfɪltər/

动词形式

present simple I / you / we / they filter	/ˈfɪltə(r)/ /ˈfɪltər/
he / she / it filters	/ˈfɪltəz/ /ˈfɪltərz/
past simple filtered	/ˈfɪltəd/ /ˈfɪltərd/
past participle filtered	/ˈfɪltəd/ /ˈfɪltərd/
-ing form filtering	/ˈfɪltərɪŋ/ /ˈfɪltərɪŋ/

Phrasal Verbs

[transitive] filter something to pass liquid, light, etc. through a special device, especially to remove something that is not wanted过滤
- All drinking water must be filtered.所有饮用水必须经过过滤。
- Use a sun block that filters UVA effectively.使用能有效滤掉长波紫外线的防晒霜。
- (figurative) My secretary is very good at filtering my calls (= making sure that calls that I do not want do not get through).我的秘书很会替我推掉不相干的电话。
see also filtration
Wordfinder
- absorb
- condense
- dilute
- dissolve
- evaporate
- filter
- immerse
- liquid
- rinse
- saturated
[transitive] filter something to use a special program to check the content of emails or websites before they are sent to your computer（用程序）筛选，过滤
[intransitive] + adv./prep. (of people人) to move slowly in a particular direction缓行
- The doors opened and people started filtering through.门开了，人们开始徐徐通过。
[intransitive] + adv./prep. (of information, news, etc.信息、新闻等) to slowly become known慢慢传开；走漏
- More details about the crash are filtering through.关于这场空难的具体情况慢慢披露了。
[intransitive] + adv./prep. (of light or sound光或声) to come into a place slowly or in small amounts渗入；透过
- Sunlight filtered in through the curtains.阳光从窗帘透了进来。
[intransitive] (British English) (of traffic at traffic lights交通指示灯处的交通) to turn left (or right) at traffic lights while other vehicles wanting to go straight ahead or turn right (or left) must wait仅可左转行驶Topics Transport by car or lorryc2

词源late Middle English (denoting a piece of felt): from French filtre, from medieval Latin filtrum ‘felt used as a filter’, of West Germanic origin and related to felt.