trace什么意思

trace什么意思
trace什么意思

trace什么意思
trace [treis]
n.痕迹,踪迹,微量,迹线,缰绳
vt.追踪,回溯,描绘
vi.追溯,沿路走
[化] 迹
[医] 痕迹; 微量,痕量
[经] 溯查,追踪,追溯
trace 1
/ treɪs; tres/ n
[C,U] mark,track,sign,etc showing what has existed or happened 踪迹; 痕迹; 形迹:traces of prehistoric habitation 史前居民的遗迹 * The police have been unable to find any trace of the gang.警方一直未能找到那团伙的任何踪迹.* We've lost all trace of him,ie We no longer know where he is.我们现在不知道他的下落了.* The ship had vanished without trace.那船消失得无影无踪.
[C] very small amount 极微的量:The post-mortem revealed traces of poison in his stomach.验尸发现他胃中有微量毒物.* He spoke without a trace of emotion.他说话时毫不动感情.
# `trace element substance occurring or needed only in extremely small amounts (esp in the soil,for the proper growth of plants) 微量元素,痕量元素（尤指土壤中的,植物正常生长所需要的）.trace 2
/ treɪs; tres/ v
(a) [Tn,Tn.pr] sb/sth (to sth) follow or discover sb/sth by finding and noticing marks,tracks or other evidence 追踪; 跟踪; 追溯; 探索; 查出:I cannot trace the letter to which you refer.我查不到你提到的那封信.* Archaeologists have traced many Roman roads in Britain.考古学家在英国发现了许多古罗马的道路.* The criminal was traced to Glasgow.追踪那个罪犯直追到格拉斯哥.(b) [Tn] describe the development of (sth) 描述（某事）的发展过程:a book which traces the decline of the Roman empire 叙述罗马帝国衰亡的书.
[Tn,Tn.pr,Tn.p] sth (back) (to sth)find the origin of sth 找出某事的根源:He traces his descent back to an old Norman family.他追踪自己的世系上溯至一个古老的诺曼家族.* Her fear of water can be traced back to a childhood accident.她很怕水,起因可归於儿时的一次事故.* The cause of the fire was traced to a faulty fuse-box.起火的原因已查出是因保险丝盒中有短路.
[Tn,Tn.p] sth (out) (a) sketch or indicate the outline of sth 画出或描绘出某物的轮廓:We traced out our route on the map.我们在地图上画出我们的路线.* (fig 比喻) Those who came later followed the policies he had traced out.后来的人都按他制定的方针政策行事.(b) form letters,etc slowly and with difficulty 缓慢而费力地写字等:He traced his signature laboriously.他吃力地签上自己的名字.
[Tn] copy (a map,drawing,etc) on transparent paper placed over it （将透明纸置於地图、 图画等上）复制,描摹.
> tracer n
1 person or thing that traces 追踪者; 追踪装置; 描摹者; 描摹工具.
2 bullet or shell whose course is made visible by a line of smoke,etc left behind it 曳光弹:[attrib 作定语] tracer bullets 曳光弹.
3 radioactive substance whose course through the human body,etc can be traced by the radiation it produces,used for investigating a chemical or biological process 示踪物.
tracing n copy of a map,drawing,etc made by tracing (trace2 4) it 摹图; 描图.
# `tracing-paper n [U] strong transparent paper for making tracings 描图纸.trace 3
3 / treɪs; tres/ n
(usu pl 通常作复数) either of the two straps,chains or ropes by which a horse is attached to and pulls a wagon,carriage,etc 挽绳; 挽缰.=>illus at harness 见harness插图.
(idm 习语) kick over the traces => kick1

trace [ treis ] vi. 追溯；沿路走
vt. 追踪，查探；描绘；回溯
n. 痕迹，踪迹；微量；迹线；缰绳
[过去式traced 过去分词traced 现在分词tracing ]