| 单词 | tracer |
| 释义 | tracer (once / 13857 pages) 1n 2n 3n 4n WORD FAMILY tracer: tracers+/retrace: retraced, retraces, retracing/trace: retrace, traceable, traced, tracer, traces, tracing/traceable: traceably, untraceable/tracing: tracings/untraceable: untraceably USAGE EXAMPLESHe judged the distance before killing the man by watching the arc of machine-gun tracers as another Marine fired bursts that missed. New York Times(Dec 28, 2016) In addition to spectroscopy, Dr. Roberts helped popularize the use of isotopes as tracers to monitor where atoms move during chemical reactions. New York Times(Nov 06, 2016) Goldstein is now using his imaging tracer to find signs of Parkinson's earlier in the course of the disease. Nature(Oct 25, 2016) 1 n an investigator who is employed to find missing persons or missing goods 2Hyper detective, investigator, police detective, tec a police officer who investigates crimes n an instrument used to make tracings 3Hyper instrument a device that requires skill for proper use n ammunition whose flight can be observed by a trail of smoke 4Syn|Hyper tracer bullet ammo, ammunition projectiles to be fired from a gun n (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes Hyper radioisotope a radioactive isotope of an element; produced either naturally or artificially |
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