单词 | filter |
释义 | filter (once / 761 pages) 1nv 2n A machine or device that removes dangerous or unwanted materials from a substance passing through it is called a filter. A kitchen water filter makes the water safer to drink — and also taste better. Cars have many different filters, each of which takes impurities out of air, fuel, or water before it enters the car's engine. Most coffee makers require paper filters that allow brewed coffee to flow into the pot while leaving the coffee grounds behind. Filter is also a verb, meaning to strain or remove particular particles. The Medieval Latin root is filtrum, or "felt," which was used by early chemists to strain liquids, especially when purifying water. WORD FAMILYfilter: filtered, filtering, filters, filtrate, filtration+/filtrate: filtrated, filtrates, filtrating/filtration: filtrations USAGE EXAMPLESAnd yes, Mark, this annual dinner column is fake news, but please don’t filter it! New York Times(Jan 02, 2017) Then the joy filter fails: tights don’t bring me joy. The Guardian(Jan 02, 2017) The ambient air is Newark’s, but filtered, ventilated, heated, and cooled. The New Yorker(Jan 01, 2017) 1 1n device that removes something from whatever passes through it Hypo|Hyper air cleaner, air filter a filter that removes dust from the air that passes through it bacteria bedlayer of sand or gravel used to expose sewage effluent to air and the action of microorganisms coffee filterfilter (usually of paper) that passes the coffee and retains the coffee grounds drain basketa filter in a sink drain; traps debris but passes water filter bedfilter consisting of a layer of sand or gravel for filtering water fuel filtera filter in the fuel line that screens out dirt and rust particles from the fuel diffusing screen, light filtera transparent filter that reduces the light (or some wavelengths of the light) passing through it oil filtera filter that removes impurities from the oil used to lubricate an internal-combustion engine strainera filter to retain larger pieces while smaller pieces and liquids pass through water filtera filter to remove impurities from the water supply glass woolglass fibers spun and massed into bundles resembling wool diatomaceous earth, diatomite, kieselguhra light soil consisting of siliceous diatom remains and often used as a filtering material colander, cullenderbowl-shaped strainer; used to wash or drain foods filter tipan air filter on the end of a cigarette; contains material that filters the smoke screen, sievea strainer for separating lumps from powdered material or grading particles tea-strainera device to keep back tea leaves when pouring a cup of tea device an instrumentality invented for a particular purpose 2v remove by passing through a filter filter out the impurities Syn|Hyper filter out, filtrate, separate out, strain separate divide into components or constituents 3v pass through Syn|Hypo|Hyper percolate, permeate, sink in infiltrate pass into or through by filtering or permeating infiltratecause (a liquid) to enter by penetrating the interstices penetrate, perforate pass into or through, often by overcoming resistance 4v run or flow slowly, as in drops or in an unsteady stream 2Syn|Hypo|Hyper dribble, trickle leach, percolate permeate or penetrate gradually course, feed, flow, run move along, of liquids n an electrical device that alters the frequency spectrum of signals passing through it Hypo|Hyper high-pass filter a filter that passes frequencies above a certain value and attenuates frequencies below that value low-pass filtera filter that passes frequencies below a certain value and attenuates frequencies above that value electrical device a device that produces or is powered by electricity |
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