英语词汇“tracer”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

trac•er n.

a person or thing that traces.
a person whose business or work is the tracing of missing property, parcels, persons, etc.
an inquiry sent from point to point to trace a missing shipment, parcel, or the like, as in a transportation system.
any of various devices for tracing drawings, plans, etc.
Also called trac′er ammuni′tion. ammunition containing a chemical substance that causes a projectile to trail smoke or fire so as to make its path visible and indicate a target to other firers, esp. at night.
the chemical substance contained in such ammunition.
a substance, esp. a radioactive one, traced through a biological, chemical, or physical system in order to study the system.

trace¹ + -er¹ 1535–45

Collins Concise English Dictionary © HarperCollins Publishers::

tracer /ˈtreɪsə/ n

a person or thing that traces
a projectile that can be observed when in flight by the burning of chemical substances in its base
ammunition consisting of such projectiles
(as modifier): tracer fire
any radioactive isotope introduced into the body to study metabolic processes, absorption, etc, by following its progress through the body with a gamma camera or other detector
an investigation to trace missing cargo, mail, etc

trace¹ n., v., traced, trac•ing,
n. [countable]

a mark, sign, or piece of evidence of the existence, influence, or action of someone, something, or some event:Those statues are the only traces of a once-great civilization.
a small amount or sign of some quality, characteristic, etc.:a trace of sadness in her smile.
Chemistryan extremely small amount of some substance or part:a trace of copper in that alloy.
traces, [plural] the series of footprints left by an animal.
a tracing, drawing, or sketch of something.
a lightly drawn line:the traces on the seismograph when the last earthquake hit.

v. [~ + object]

to follow the footprints, tracks, or traces of:The FBI traced the van back to the rental company.
to follow (footprints, evidence, the history or course of something, etc.)
to find out or uncover by investigating:to trace the cause of the disease.
to draw or copy (a line, etc.), as by copying and following the lines of the original on a piece of transparent paper placed over it:She traced the picture of the dog onto her notebook paper.

trace•a•ble, adj.
trac•er, n. [countable]See -trac-.

trace¹ n., v., traced, trac•ing.
n.

a surviving mark, sign, or evidence of the former existence, influence, or action of some agent or event;
vestige:traces of an advanced civilization among the ruins.
a barely discernible indication or evidence of some quantity, quality, characteristic, expression, etc.:a trace of anger in his tone.
an extremely small amount of some chemical component:a trace of copper in its composition.
traces, the series of footprints left by an animal.
the track left by the passage of a person, animal, or object:the trace of her skates on the ice.
[Meteorol.]precipitation of less than 0.005 in. (0.127 mm).
a trail or path, esp. through wild or open territory, made by the passage of people, animals, or vehicles.
Psychologyengram.
a tracing, drawing, or sketch of something.
a lightly drawn line, as the record drawn by a self-registering instrument.
[Math.]
- the intersection of two planes, or of a plane and a surface.
- the sum of the elements along the principal diagonal of a square matrix.
- the geometric locus of an equation.
the visible line or lines produced on the screen of a cathode-ray tube by the deflection of the electron beam.
[Ling.](in generative grammar) a construct that is phonologically empty but serves to mark the place in the surface structure of a sentence from which a noun phrase has been moved by a transformational operation.
[Obs.]a footprint.

v.t.

to follow the footprints, track, or traces of.
to follow, make out, or determine the course or line of, esp. by going backward from the latest evidence, nearest existence, etc.:to trace one's ancestry to the Pilgrims.
to follow (footprints, evidence, the history or course of something, etc.).
to follow the course, development, or history of:to trace a political movement.
to ascertain by investigation;
find out;
discover:The police were unable to trace his whereabouts.
to draw (a line, outline, figure, etc.).
to make a plan, diagram, or map of.
to copy (a drawing, plan, etc.) by following the lines of the original on a superimposed transparent sheet.
to mark or ornament with lines, figures, etc.
to make an impression or imprinting of (a design, pattern, etc.).
(of a self-registering instrument) to print in a curved, broken, or wavy-lined manner.
to put down in writing.

v.i.

to go back in history, ancestry, or origin;
date back in time:Her family traces back to Paul Revere.
to follow a course, trail, etc.;
make one's way.
(of a self-registering instrument) to print a record in a curved, broken, or wavy-lined manner.

Old French, derivative of tracier
Vulgar Latin *tractiāre, derivative of Latin tractus, past participle of trahere to draw, drag; (noun, nominal) Middle English: origin, originally, way, course, line of footprints
Middle French tracier
late Middle English tracen, Middle English: to make one's way, proceed 1250–1300

1.See corresponding entry in Unabridged Trace, vestige agree in denoting marks or signs of something, usually of the past. Trace, the broader term, denotes any mark or slight indication of something past or present:a trace of ammonia in water.Vestige is more limited and refers to some slight, though actual, remains of something that no longer exists:vestiges of one's former wealth.
2.See corresponding entry in Unabridged hint, suggestion, taste, touch.
5.See corresponding entry in Unabridged spoor, trail, record.
15.See corresponding entry in Unabridged trail.

3.See corresponding entry in Unabridged abundance, plethora.

trace² n.

either of the two straps, ropes, or chains by which a carriage, wagon, or the like is drawn by a harnessed horse or other draft animal. See illus. under harness.
a piece in a machine, as a bar, transferring the movement of one part to another part, being hinged to each.
kick over the traces, to throw off restraint;
become independent or defiant:He kicked over the traces and ran off to join the navy.

Latin tractus a drawing, dragging; see tract¹
Middle French, plural of trait strap for harness, action of drawing
Middle English trais 1300–50

单词	tracer
释义	WordReference Random House Unabridged Dictionary of American English © 2024 trac•er (trā′sər),USA pronunciation n. a person or thing that traces. a person whose business or work is the tracing of missing property, parcels, persons, etc. an inquiry sent from point to point to trace a missing shipment, parcel, or the like, as in a transportation system. any of various devices for tracing drawings, plans, etc. Also called trac′er ammuni′tion. ammunition containing a chemical substance that causes a projectile to trail smoke or fire so as to make its path visible and indicate a target to other firers, esp. at night. the chemical substance contained in such ammunition. a substance, esp. a radioactive one, traced through a biological, chemical, or physical system in order to study the system. trace¹ + -er¹ 1535–45 Collins Concise English Dictionary © HarperCollins Publishers:: tracer /ˈtreɪsə/ n a person or thing that traces a projectile that can be observed when in flight by the burning of chemical substances in its base ammunition consisting of such projectiles (as modifier): tracer fire any radioactive isotope introduced into the body to study metabolic processes, absorption, etc, by following its progress through the body with a gamma camera or other detector an investigation to trace missing cargo, mail, etc WordReference Random House Learner's Dictionary of American English © 2024 trace¹ /treɪs/USA pronunciation n., v., traced, trac•ing, n. [countable] a mark, sign, or piece of evidence of the existence, influence, or action of someone, something, or some event:Those statues are the only traces of a once-great civilization. a small amount or sign of some quality, characteristic, etc.:a trace of sadness in her smile. Chemistryan extremely small amount of some substance or part:a trace of copper in that alloy. traces, [plural] the series of footprints left by an animal. a tracing, drawing, or sketch of something. a lightly drawn line:the traces on the seismograph when the last earthquake hit. v. [~ + object] to follow the footprints, tracks, or traces of:The FBI traced the van back to the rental company. to follow (footprints, evidence, the history or course of something, etc.) to find out or uncover by investigating:to trace the cause of the disease. to draw or copy (a line, etc.), as by copying and following the lines of the original on a piece of transparent paper placed over it:She traced the picture of the dog onto her notebook paper. trace•a•ble, adj. trac•er, n. [countable]See -trac-. WordReference Random House Unabridged Dictionary of American English © 2024 trace¹ (trās),USA pronunciation n., v., traced, trac•ing. n. a surviving mark, sign, or evidence of the former existence, influence, or action of some agent or event; vestige:traces of an advanced civilization among the ruins. a barely discernible indication or evidence of some quantity, quality, characteristic, expression, etc.:a trace of anger in his tone. an extremely small amount of some chemical component:a trace of copper in its composition. traces, the series of footprints left by an animal. the track left by the passage of a person, animal, or object:the trace of her skates on the ice. [Meteorol.]precipitation of less than 0.005 in. (0.127 mm). a trail or path, esp. through wild or open territory, made by the passage of people, animals, or vehicles. Psychologyengram. a tracing, drawing, or sketch of something. a lightly drawn line, as the record drawn by a self-registering instrument. [Math.] the intersection of two planes, or of a plane and a surface. the sum of the elements along the principal diagonal of a square matrix. the geometric locus of an equation. the visible line or lines produced on the screen of a cathode-ray tube by the deflection of the electron beam. [Ling.](in generative grammar) a construct that is phonologically empty but serves to mark the place in the surface structure of a sentence from which a noun phrase has been moved by a transformational operation. [Obs.]a footprint. v.t. to follow the footprints, track, or traces of. to follow, make out, or determine the course or line of, esp. by going backward from the latest evidence, nearest existence, etc.:to trace one's ancestry to the Pilgrims. to follow (footprints, evidence, the history or course of something, etc.). to follow the course, development, or history of:to trace a political movement. to ascertain by investigation; find out; discover:The police were unable to trace his whereabouts. to draw (a line, outline, figure, etc.). to make a plan, diagram, or map of. to copy (a drawing, plan, etc.) by following the lines of the original on a superimposed transparent sheet. to mark or ornament with lines, figures, etc. to make an impression or imprinting of (a design, pattern, etc.). (of a self-registering instrument) to print in a curved, broken, or wavy-lined manner. to put down in writing. v.i. to go back in history, ancestry, or origin; date back in time:Her family traces back to Paul Revere. to follow a course, trail, etc.; make one's way. (of a self-registering instrument) to print a record in a curved, broken, or wavy-lined manner. Old French, derivative of tracier Vulgar Latin *tractiāre, derivative of Latin tractus, past participle of trahere to draw, drag; (noun, nominal) Middle English: origin, originally, way, course, line of footprints Middle French tracier late Middle English tracen, Middle English: to make one's way, proceed 1250–1300 1.See corresponding entry in Unabridged Trace, vestige agree in denoting marks or signs of something, usually of the past. Trace, the broader term, denotes any mark or slight indication of something past or present:a trace of ammonia in water.Vestige is more limited and refers to some slight, though actual, remains of something that no longer exists:vestiges of one's former wealth. 2.See corresponding entry in Unabridged hint, suggestion, taste, touch. 5.See corresponding entry in Unabridged spoor, trail, record. 15.See corresponding entry in Unabridged trail. 3.See corresponding entry in Unabridged abundance, plethora. trace² (trās),USA pronunciation n. either of the two straps, ropes, or chains by which a carriage, wagon, or the like is drawn by a harnessed horse or other draft animal. See illus. under harness. a piece in a machine, as a bar, transferring the movement of one part to another part, being hinged to each. kick over the traces, to throw off restraint; become independent or defiant:He kicked over the traces and ran off to join the navy. Latin tractus a drawing, dragging; see tract¹ Middle French, plural of trait strap for harness, action of drawing Middle English trais 1300–50
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