filter

过滤器, 滤纸; 过滤料(如砂、炭、纸、布等)

【物】滤光器; 滤色镜;【无】滤波器

滤管, 滤池

滤声器

【数】滤子

射线过滤板

【计】筛选程序

filter

a porous substance, such as paper or sand, that allows fluid to pass but retains suspended solid particles: used to clean fluids or collect solid particles

any device containing such a porous substance for separating suspensions from fluids

any of various porous substances built into the mouth end of a cigarette or cigar for absorbing impurities such as tar

any electronic, optical, or acoustic device that blocks signals or radiations of certain frequencies while allowing others to passSee band-pass filter

any transparent disc of gelatine or glass used to eliminate or reduce the intensity of given frequencies from the light leaving a lamp, entering a camera, etc

a traffic signal at a road junction consisting of a green arrow which when illuminated permits vehicles to turn either left or right when the main signals are red

to remove or separate (suspended particles, wavelengths of radiation, etc) from (a liquid, gas, radiation, etc) by the action of a filter

to obtain by filtering

to pass (through a filter or something like a filter)

to flow slowly; trickle