词典释义：
find or discover by investigation
（通过调查）找到，发现
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police are trying to trace a white van seen in the area .警方正设法查找曾在此地区出现的白色货车。
find or describe the origin or development of
追溯，追究，查考
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Bob's book traces his flying career with the RAF .鲍勃的书追溯了他在英国皇家空军的飞行生涯。
follow or mark the course or position of (something) with one's eye, mind, or finger
追踪，跟踪
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through the binoculars, I traced the path I had taken the night before .我用双筒望远镜追踪了昨晚走的路。
take (a particular path or route)
沿（特定路径）走
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a tear traced a lonely path down her cheek .一滴泪珠孤寂地滑下她的脸颊。
copy (a drawing, map, or design) by drawing over its lines on a superimposed piece of transparent paper
映描，描摹。
draw (a pattern or line), especially with one's finger or toe
（尤指用手指、脚趾）画（图，线）。
give an outline of
勾画出轮廓，描绘
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the article traces out some of the connections between education, qualifications, and the labour market .这篇文章勾勒出教育，资格及劳动力市场之间的某些联系。
a mark, object, or other indication of the existence or passing of something
痕迹，踪迹
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remove all traces of the old adhesive 除去所有旧的粘合剂留下的痕迹
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[mass noun]
the aircraft disappeared without trace .飞机消失得无影无踪。
〈西印度，美〉 踏出来的小路，小径；小道。
a physical change in the brain presumed to be caused by a process of learning or memory
（大脑上的学习或记忆）痕迹，印迹。
【语言学】 （转换生成语法中的）语迹。
a procedure to investigate the source of something, such as the place from which a telephone call was made, or the origin of a fault in a computer program
（确定来电话者或计算机程序里确定故障源的）跟踪。
a very small quantity, especially one too small to be accurately measured
微量，少许（尤指太少无法精确量算）
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his body contained traces of amphetamines 他身体里有微量安非他明
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[as modifier]
trace quantities of PCBs .微量多氯化联苯。
a slight indication or barely discernible hint of something
丝毫；勉强可以发现的痕迹
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just a trace of a smile .仅是一丝微笑。
a line or pattern displayed by an instrument using a moving pen or a luminous spot on a screen to show the existence or nature of something which is being investigated
描记线，描记图。
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
交线，迹线，轨迹。
【数】 迹。
each of the two side straps, chains, or ropes by which a horse is attached to a vehicle that it is pulling
挽绳，缰绳。
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kick over the traces become insubordinate or reckless 挣脱羁绊，变得不服从，鲁莽
"Middle English （first recorded as a noun in the sense ‘path that someone or something takes’）： from Old French
