How far back can you trace your family tree?
你的家谱可以追溯到多少代？
He was able to trace his ancestry back over 1 000 years.
他可追祖溯宗至1 000年以前。
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。
"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。
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。
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？
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。
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。
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。
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。
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。
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。
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。
One way to determine your foot shape is to do a "wet test"—wet your foot, step on a piece of brown paper and trace your footprint.
有个能确定你的脚型的方法就是做“湿足测试”——把你的脚浸湿，踩在一张牛皮纸上，然后勾画出你的脚印。
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。
Like a family tree that you might use to trace 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。
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。
Rather than merely a sign, it is the root from which we can trace 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。
By analyzing the DNA, the genetic material of the proteins, the researchers could focus on the toxic genes and use them to trace 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。
他消失得无影无踪。
The trace showed a normal heart rhythm.
描记图表明心率正常。
The ship had vanished without (a) trace.
那艘船消失得无影无踪。
She spoke without a trace of bitterness.
她说话时一点儿也不伤感。
Our efforts to trace him turned up nothing.
我们辛辛苦苦跟踪他，却无功而返。
One day he left, disappeared without a trace.
有一天他离开了，消失得无影无踪。
All her yesterdays had vanished without a trace.
她的过去已经完全烟消云散了。
A trace 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。
They can trace their lineage back to the 18th century.
他们的家族可以直接追溯到18世纪。
She could trace her family tree back to the 16th century.
她能把本族家谱追溯到16世纪。
The prince's manner was informal, without a trace of pomposity.
王子的态度平易谦和，没有一点傲气。
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