n (1) 过滤器，滤纸(device for separating solid substances from a liquid or gas) [C]：coffee/cigarette～咖啡过滤器/香烟过滤嘴;pass sth through a～将某物从漏斗中滤过;A～is used to make sure that the oil is clean and does not contain any dirt. 用滤油器来确保油的干净，不含杂质。〖同〗 strainer，screen;

(2) 滤光(色)镜(kind of screening plate used to change or correct certain colours) [C]：take a picture with a blue～用蓝色滤光镜拍摄照片;use a red～使用红色滤光镜;

(3) 滤波器(device for permitting only waves of particular frequencies to pass，eliminating or reducing the others) [C]：band～带通滤波器;

v (1) 过滤，滤清(掉) (pass sth through filter;remove or purify by means of a filter) [T+n]：～water/the light/the moisture (out of the air) 滤水/滤光/除去(空气中的)湿气;The wine must be～ed several times before it is clear. 酒必须要过滤数次才能变清。〖同〗strain，refine，purify，clarify;〖反〗 disturb，thicken，mix，merge，combine;

(2) 渗入，透过;(消息)走漏;慢慢传开 (flow or pass slowly into;become known bit by bit or gradually) [I，I+prep(in/into/through)，I+adv(out/through)] (fig)：(people)～through enemy lines/out of the cinema/into the room (人们)慢慢地穿过敌人的防线/从影院中走出/进入房间;The truth was slowly～ing into people's minds. 真理开始慢慢地深入人心。The news of the president's death～ed out/through the crowds/to everyone. 总统去世的消息逐渐泄露出来/在人群中慢慢传开/逐渐传到每个人的耳中。〖同〗leak，drain;

→′filterable adj 可滤(过)的;͵filtera′bility n 可滤性(率)