| 单词 | detector |
| 释义 | detector (once / 4187 pages) n A detector is a machine that responds to particular substances in a consistent way. Everyone who flies on an airplane must pass through a metal detector, which beeps when it senses metal. A "lie detector" works by measuring pulse and eye movements as a person responds to a series of questions. A radioactivity detector looks for high levels of radioactivity in nuclear power plants. Since the invention of detectors, the idea of more fantastical detectors has filled the human imagination. A love detector: why not? WORD FAMILYdetector: detectors+/detect: detectable, detected, detecting, detection, detective, detector, detects/detectable: detectably, undetectable/detected: undetected/detection: detections/detective: detectives/undetectable: undetectably USAGE EXAMPLES“This generation of detectors should be the last,” said astronomer Stacy McGaugh at Case Western Reserve University in Cleveland, Ohio. The Guardian(Dec 31, 2016) There are law enforcement officers at the doors and metal detectors guarding the place. Washington Times(Dec 31, 2016) With new security put in place, metal detectors and gun lockers, will you ban that practice? Washington Times(Dec 27, 2016) 1n any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner Syn|Hypo|Hyper sensing element, sensor metal detector detector that gives a signal when it detects the presence of metal; used to detect the presence of stray bits of metal in food products or to find buried metal mine detectordetector consisting of an electromagnetic device; used to locate explosive mines electric eye, magic eye, photocell, photoconductive cell, photoelectric cella transducer used to detect and measure light and other radiations trace detectora screening device for traces of explosives; used at airline terminals selenium cella photoelectric cell that uses a strip of selenium device an instrumentality invented for a particular purpose 2n electronic equipment that detects the presence of radio signals or radioactivity Hypo|Hyper crystal detector a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier electronic scanner, scannera radio receiver that moves automatically across some selected range of frequencies looking for some signal or condition electronic equipment equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor) 3n rectifier that extracts modulation from a radio carrier wave Syn|Hyper demodulator rectifier electrical device that transforms alternating into direct current |
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