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1·How far back can you trace your family tree?

你的家谱可以追溯到多少代？《牛津词典》

2·He was able to trace his ancestry back over 1 000 years.

他可追祖溯宗至1 000年以前。《牛津词典》

3·Staff will be able to trace calls at the touch of a button.

员工只要一按按钮就可以追踪电话。《柯林斯英汉双解大词典》

4·The most important thing is to be honest, she says, without the trace of a blush.

“最重要的是要诚实。”她说道，丝毫不脸红。《柯林斯英汉双解大词典》

5·I leave no trace and have no friends.

我不会留下任何痕迹，而且我也没有朋友。

6·Can one trace 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？

7·Instead this new enzyme incorporates another trace metal, cadmium.

相反，这种新酶加入了另一种微量金属——镉。

8·They try to trace 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。

9·Each time this initial memory trace is replayed, it becomes even stronger.

每次“重播”这段原始记忆轨迹时，它都会变得更加深刻。

10·Indeed, Mr. Prance's new device can pick up the trace 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。

跟踪

1·This will add some variety to the trace 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。

2·Our efforts to trace him turned up nothing.

我们辛辛苦苦跟踪他，却无功而返。《牛津词典》

3·In order for their computers to trace a person's records, they need both the name and address of the individual.

为了使他们的计算机跟踪某个人的记录，他们需要这个人的名字和地址。《柯林斯英汉双解大词典》

4·The dialog asks if you like the collector to enable trace on your server for you (Figure 7).

此对话框会询问您是否喜欢收集器在您的服务器上启动跟踪(图7)。

5·This feature really helps you trace and understand the execution of the transformation.

这个特性确实帮助你跟踪和理解转换的执行。

微量

1·Instead this new enzyme incorporates another trace metal, cadmium.

相反，这种新酶加入了另一种微量金属——镉。

2·Information about dietary variation among community members is derived by analyzing trace 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。

3·These minerals can be dated by radioactive decay techniques because of the very small quantities of radioactive trace 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。

4·There are tiny amounts of uranium residue in coal; those trace residuals have more energy potential than all the coal itself.

煤炭中有微量的铀残留物；而这些微量残留所蕴含的能量比所有的煤炭本身还要多。

5·Most trace elements, including manganese and arsenic, get into the water through the natural process of rock weathering.

大部分微量元素，包括锰和砷，通过自然过程中的岩石风化作用进入水体。

痕迹

1·I leave no trace and have no friends.

我不会留下任何痕迹，而且我也没有朋友。

2·Indeed, Mr. Prance's new device can pick up the trace 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。

3·The graceful preface was laced by a commonplace maid near the furnace in the palace without any trace of embrace.

这份优雅的前言是由一个平凡的侍女在宫殿里的火炉边，不留住拥抱过的痕迹而系上带子的。

4·Since then I will know that faking can get to false, can justify from class go away, cheesy leave no trace.

从那时候起我就知道了，装病能请到假，可以名正言顺的从课堂上走开，潇洒的不留任何痕迹。

5·This would explain why the human genome has no trace of Neanderthal DNA despite the two similar species living close together for millennia.

这可能解释为什么人类的基因组没有尼安得特人的痕迹，即便这两个物种在一起生活了几千年。

追踪

1·Staff will be able to trace calls at the touch of a button.

员工只要一按按钮就可以追踪电话。《柯林斯英汉双解大词典》

2·A group of researchers reveal scores of studies that trace 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。

3·They could trace 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。

4·They then try to trace through every piece of data linked through those.

然后它们尝试去追踪通过这些数据连接到每一块数据。

5·After deciding to use tracing in your application, you may wish to configure some of the details of your trace.

在决定把追踪应用到你的应用程序之后，你或许想要配置一些你的追踪的细节信息。

痕量

1·They fill the container with pure air made by evaporating liquid nitrogen and liquid oxygen, and add water vapour and some trace gases.

他们将容器充满由蒸发液态氮和液态氧得到的纯空气，再加入水蒸气和一些痕量气体。

2·They occur in such trace amounts in natural, or whole, coal that they aren't a problem.

它们在天然煤(或称“全”煤)中仅以痕量存在，并不构成问题。

3·So Farihi thinks that the trace elements must have come from another source: remnants of rocky planets, forming a ring of debris that slowly rains down on the white dwarf.

因此Farihi认为痕量元素肯定来自另一来源：岩石行星的残骸形成的碎屑环，慢慢地向白矮星掉落。

4·The method can be used to trap trace gallium in water samples, zinc concentrate and artificial zinc samples.

该法能很好的捕集水样，锌精矿和人工合成锌样中的痕量镓。

5·The method can be used to trap trace molybdenum in water samples and copper concentrate.

该法能很好的捕集水样，铜精矿中的痕量钼。

踪迹

1·Police searched the area but found no trace 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。《牛津词典》

2·We cannot infer from which direction these robbers escaped because we could not find any trace of them.

我们推断不出这些强盗是从哪个方向逃走的，因为我们找不到他们的任何踪迹。

3·Despite a huge conventional search operation (followed by more exotic efforts involving psychics and a Gurkha parachuted into Cambodia), no trace was ever found of him.

尽管人们进行了大规模的常规搜索(后来还使用了更多带有异国风情的方法，包括通灵术和派一个廓尔喀族人空降柬埔寨)，却未发现他的丝毫踪迹。

4·We could not reason out which way the robbers escaped, because we were unable to find any trace of them.

我们推断不出这些强盗是从哪个方向逃走的，因为我们找不到他们的任何踪迹。

5·To gather a function call trace, you need to identify when every function is called in your application.

要收集一个函数调用的踪迹，您需要确定每个函数在应用程序中调用的时间。

追溯

1·In September it warned that it would be impossible to set up a regime to trace and label food from farms with cloned animals.

但在九月份，标准局警告说，建立某种制度以追溯和标记来自农场克隆动物的食品是不可能的。

2·Establish an appropriate trace level.

建立恰当的追溯层次。

3·With the call still connected to CTU Milo continues his attempts to trace the call.

电话仍然与反恐组连线，麦洛继续试图追溯这个手机的方位。

4·With the call still connected to CTU, Milo continues his attempts to trace the call.

电话仍然与反恐组连线，麦洛继续试图追溯这个手机的方位。

5·A trace relationship between the original requirement and the branch requirement can help you stay in touch with changes that are made to requirements by other teams.

原始需求与分支需求之间的追溯关系，可以帮助您对其他团队对需求所做的变更能保持一致。

迹

1·The recorder trace is a series of inverse peaks .

记录器扫迹是一系列相反的波峰。

2·The gear machining and measuring essence based on the point engaging principle are revealed, moreover the application of contact trace in gear machining and measuring is expounded.

揭示了基于点啮合原理的齿轮加工与测量的实质，并阐述了接触迹在齿轮加工与测量中的应用。

3·A mother's love is like the sea, accommodate infinite, a mother's love is like day, without a trace, endless blessing world all mother, and my mom, happy mother's day!

母爱似海，容纳无限，母爱似天，无边无迹，祝福天底下所有的母亲，还有我的妈妈，母亲节快乐！

4·With matrix conversion of geometry optics as a basis, simulation and modeling for complex multi-lens imaging optical system for four-quad splitting are carried out through light ray trace.

以几何光学的矩阵变换为基础，通过光线追迹的方法，对四象限分光的多透镜成像复杂光学系统进行仿真建模。

5·Gives some upper bounds and lower bounds for eigenvalues using trace of matrix.

给出了一些用矩阵的迹表示的特征值的上、下界。

追查

1·Greenpeace claims records show that cattle from hundreds of farms across the Amazon are mixed and processed in this way, making it currently impossible to trace the origins of products.

该组织声称，有记录显示亚马逊几百个牧场供应的牛以这种方式混在一起加工，使得目前无法追查产品的来源。

2·We're hoping to trace the effect of that farm crisis 20 years later on their ability to retire comfortably, says Lorenz.

“我们希望能追查农场危机发生20年后，对退休生活的影响，”洛伦茨说。

3·The Pentagon's criminal investigations department continues to try to trace the leaks and recently unsuccessfully asked Assange, he says, to meet them outside the US to help them.

美国五角大楼的刑事调查部门正在继续试图追查泄密事件。

4·Once you begin to see the dimensions that are invisible or at least see the attributes that they trace in the explosions that are artificially created, it will be obvious.

一旦你开始看到无形的密度，或者至少看到特性，即他们追查那人为制造的爆炸的特性时，这将是显而易见的。

5·What could be more obvious than the attempt to trace the sources of the aberrations of a period to a metaphysical crisis?

对形而上学危机而言，有什么能比尝试追查一段时期的偏差的起源更显而易见？

(1)trace element[化]微量元素

(1)without a trace无影无踪地；渺无踪迹地

(1)trace back追溯

(1)trace amount痕量；微量

(1)trace analysis痕量分析

(1)without trace不着痕迹地；了无踪迹地