1、Each time this initial memorytrace is "replayed", it becomes even stronger.(每次“重播”这段原始记忆痕迹时，它都会变得更加深刻。)
2、The ship had vanished without (a)trace.(那艘船消失得无影无踪。)
3、Staff will be able totrace calls at the touch of a button.(员工只要一按按钮就可以追踪电话。)
4、Indeed, Mr. Prance's new device can pick up thetrace of a heartbeat from a metre away.(事实上，Prance先生的新设备可以在一米之外捕捉到心跳的痕迹。)
5、Our efforts totrace him turned up nothing.(我们辛辛苦苦跟踪他，却无功而返。)
6、How far back can youtrace your family tree?(你的家谱可以追溯到多少代？)
7、They try totrace through every piece of data linked through those.(他们试图追踪每一个通过这些链接的数据。)
8、All her yesterdays had vanished without atrace.(她的过去已经完全烟消云散了。)
9、Like a family tree that you might use totrace back through generations of ancestors, only it's showing a family of genetically related languages instead of people.(就像你可以追溯祖先的家谱一样，它只是在显示与遗传相关的语言，而不是人类。)
10、The prince's manner was informal, without atrace of pomposity.(王子的态度平易谦和，没有一点傲气。)
11、Information about dietary variation among community members is derived by analyzingtrace elements in human bone.(关于社区成员之间饮食变化的信息是通过分析人体骨骼中的微量元素得到的。)
12、These minerals can be dated by radioactive decay techniques because of the very small quantities of radioactivetrace elements they, in turn, contain.(这些矿物可以用放射性衰变技术测定年代，因为它们所含的放射性微量元素非常少。) Hao86.com
13、Can onetrace this same pattern far back in prehistory?(我们能把同样的这种模式追溯到遥远的史前吗？)
14、He vanished withouttrace.(他消失得无影无踪。)
15、Instead this new enzyme incorporates anothertrace metal, cadmium.(相反，这种新酶加入了另一种微量金属——镉。)
16、Rather than merely a sign, it is the root from which we cantrace back to our ancestor, the tie that helps bind us to other members of the same clan, the dignity most people hope to live for.(它不仅仅是一种标志，更是我们可以追溯到祖先的根源，是将我们与同族其他成员联系在一起的纽带，是大多数人希望为之而活的尊严。)
17、She couldtrace her family tree back to the 16th century.(她能把本族家谱追溯到16世纪。)
18、By analyzing the DNA, the genetic material of the proteins, the researchers could focus on the toxic genes and use them totrace the evolution of snake venom, and from this, the evolution of snakes.(通过对DNA及蛋白质中的基因物质进行分析，研究人员可以专注于有毒基因，并利用它们得到蛇毒的进化轨迹，这样也就知道了蛇的进化源。)
19、This will add some variety to thetrace output to illustrate the power of the technique.(这样将为跟踪输出添加一些变化，以说明该技术的强大能力。)
20、One day he left, disappeared without atrace.(有一天他离开了，消失得无影无踪。)
21、Police searched the area but found notrace of the escaped prisoners.(警方搜索了那一地区，但未发现越狱逃犯的任何踪迹。)
22、They couldtrace the growth and shrinkage of continental glaciers, even in parts of the ocean where there may have been no great change in temperature—around the equator, for example.(他们可以追踪大陆冰川的生长和收缩，即使是在温度变化不大的海洋区域——比如，赤道附近。)
23、A group of researchers reveal scores of studies thattrace the relationship between health and interaction with others.(一组研究人员公布了大量追踪健康和与他人互动之间关系的研究。)
24、She spoke without atrace of bitterness.(她说话时一点儿也不伤感。)
25、He was able totrace his ancestry back over 1 000 years.(他可追祖溯宗至1000年以前。)
26、Atrace of hesitancy showed in Dr. Stockton's eyes.(一丝迟疑出现在斯托克顿医生的双眼中。)
27、They cantrace their lineage back to the 18th century.(他们的家族可以直接追溯到18世纪。)
28、One cantrace such expeditions back to ancient Sumeria, the earliest known Middle Eastern civilization.(这样的探险可以追溯到古苏美尔时期，这是已知的最早的中东文明。)
29、I leave notrace and have no friends.(我不会留下任何痕迹，而且我也没有朋友。)
30、Thetrace showed a normal heart rhythm.(描记图表明心率正常。)
