Many people will leave the universe without a trace.

很多人在离世后，不留下丝痕迹。

And today the whole Pacific Ocean has traces of contamination of cesium-137.

今天，整个太平洋都 受到了铯-137的污染。

" How did you trace it, then? "

" 那么，你怎样追查出来的呢？"

This form of tracking is called contact tracing.

这种追踪方式被称为“接触者追踪”。

What do you see in this trace here?

你对这个怎么看？

The term traces back to the Confucian “Book of Songs”, and suggests a moderately prosperous society that can begin to enjoy the fruits of its labours.

小词出自孔子的《诗经》，是小社会开始享受其劳动成果的意思。

But Harry had just noticed something. Though Hermione was sobbing desperately into her hands, there was no trace of a tear.

不过哈利刚刚注意到，尽管赫敏在用双手捂着脸拼命呜咽，但是却没有滴眼泪。

Well, I've always had to check labels for traces of peanuts in everything I eat because of my allergy.

恩，因为我的过敏症，所以直要检查我吃的每个东西的标签是否含有花生。

One difficulty is that almost all of what is called behavioral science continues to trace behavior to states of mind, feelings, traits of character, human nature, and so on.

难题之在于所谓的行为科学几乎全都依然从、感、性格特征、人性等方面去寻找行为的根源。

'It's pretty certain they'll trace your car.'

" 他们会追查你的车子，这是肯定的。"

Day after day, for days unending, Buck toiled in the traces.

巴克套着缰绳作苦工, 日复日, 没完没了。

South Korea avoided a nationwide lockdown, containing COVID-19 via tracking and tracing instead.

韩国没有在全国范围内实施封锁，而是通过跟踪和追踪控制疫。

That distribution gives the sensor the sensitivity it needs to detect trace amounts of H2S.

这种分布方式让传感器拥有了检测微量硫化氢所需的灵敏度。

Harry traced the secret passage to Honeydukes with his finger.

哈利用手指沿着通往霍格莫德村的通道指着。

There was no trace of the fog now.

这会儿雾已经消失得无影无踪。

We can trace the American penchant for self-improvement at least partly to our unique history.

我们可以把美国人对自我改善的喜好至少部分归因于我们独特的历史。

Smoke detectors contain trace amounts of americium-241.

烟雾报警器含有微量镅-241。

They say that some of the dogs found in the Americas have lineage that could be traced back to ancient Siberian dogs.

他们表示，在美洲发现的些狗的血统可以追溯到古代西伯利亚狗。

It was nearing midnight and the Prime Minister was sitting alone in his office, reading a long memo that was slipping through his brain without leaving the slightest trace of meaning behind.

差不多快到午夜了，首相独自坐在办公室里，读着份长长的备忘录，但是他脑子里片空白，根本不明白那上面写的是什么意思。

The beginnings of this problem can be traced back to America, where people with a poor credit history were allowed to take out mortgages, which they were unable to repay.

此次信贷紧缩的根源在于美国。在美国，及时拥有不良信贷记录的人们也可以办理抵押贷款，而他们根本没有能偿还。