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1. Oxford Dictionary

   trace

   • IPA[treɪs]

   英式

   • v.
     find or discover by investigation；find or describe the origin or development of
   • n.
     a mark, object, or other indication of the existence or passing of something；a line or pattern displayed by an instrument to show the existence or nature of something which is being recorded or measured.

   • verb: trace, 3rd person present: traces, gerund or present participle: tracing, past tense: traced, past participle: traced

   • noun: trace, plural noun: traces

2. • 釋義

   v.

   動詞

   • 1. find or discover by investigation police are trying to trace a white van seen in the area 同義詞 track down, find, discover, detect, unearth, ... 更多uncover, turn up, hunt down, dig up, ferret out, run to ground, follow, pursue, trail, shadow, stalk, dog, find the source of, find the origins of, find the roots of, follow to its source, source
   • ▪ find or describe the origin or development of Bob's book traces his flying career with the RAF
   • ▪ follow or mark the course or position of (something) with one's eye, mind, or finger through the binoculars, I traced the path I had taken the night before
   • ▪ take (a particular path or route) a tear traced a lonely path down her cheek
   • 2. copy (a drawing, map, or design) by drawing over its lines on a superimposed piece of transparent paper trace a map of the world on to a large piece of paper 同義詞 copy, reproduce, go over, draw over, draw the lines of, ... 更多draw, draw up, sketch, draft, outline, rough out, mark out, delineate, map, chart, record, indicate, show, depict
   • ▪ draw (a pattern or line), especially with one's finger or toe she traced a pattern in the dirt with the toe of her shoe
   • ▪ give an outline of the article traces out some of the connections between education, qualifications, and the labour market

   n.

   名詞

   • 1. a mark, object, or other indication of the existence or passing of something remove all traces of the old adhesive the aircraft disappeared without trace 同義詞 vestige, sign, mark, indication, suggestion, ... 更多evidence, clue, remains, remnant, relic, survival, ghost, echo, memory, trail, track, spoor, marks, tracks, prints, imprints, footprints, footmarks, footsteps
   • ▪ a line or pattern displayed by an instrument to show the existence or nature of something which is being recorded or measured.
   • ▪ a physical change in the brain presumed to be caused by a process of learning or memory.
   • 2. a very small quantity, especially one too small to be accurately measured his body contained traces of amphetamines trace quantities of PCBs
   • ▪ a barely discernible indication of something just a trace of a smile 同義詞 bit, spot, speck, touch, hint, ... 更多suggestion, suspicion, nuance, intimation, trifle, drop, dash, tinge, tincture, streak, shred, crumb, fragment, shadow, whiff, breath, jot, iota, informalsmidgen, tad
   • 3. a procedure to investigate the source of something, such as the place from which a telephone call was made we've got a trace on the call
   • 4. a line which represents the projection of a curve or surface on a plane or the intersection of a curve or surface with a plane.
   • 5. North American, West Indian a path or track.
   • 6. the sum of the elements in the principal diagonal of a square matrix.