The story of Kaldi is difficult to pin down.

卡尔迪的故事难以溯源。

We've also gone back to our roots.

我们也要寻“根”溯源。

China has pledged to continue its participation in science-based COVID-19 origin-tracing.

中国承诺继续参与基于科学的新冠肺炎溯源工作。

Most of them were traced to an elementary school.

大多数病例可溯源到一所小学。

You always want to know where you came from, where you originated from.

你总是想知道你来自哪里, 想要追本溯源。

To understand how reciprocal the relationship is, we need to go back to how it started.

为了了解这段关系如何惠，我们需要探本溯源。

It's quite clear the responsibility for that abuse goes all the way to the top.

很明显，要为这种虐待行为承担责任者可一直溯源到最高层。

A World Health Organization expert has slammed the politicization of the coronavirus origin-tracing issue.

世界卫生组织一名专家对冠状病毒溯源问题政治化进行了抨击。

He'd never understood the need to go around stewing on why things turned out the way they did.

他从来不理解那些整天刨根问底追根溯源的人。

So I start with sustainable, traceable supply chains, and I design from there up.

所以，我从可持续、可溯源的供应，然后从那里设计。

The World Health Organization has released a report on the global tracing of the origins of COVID-19.

世界卫生组织发布了一份关于新冠肺炎全球溯源的报告。

But what we are going to look are the history of computers… even before we had electricity.

但我们将会追溯计算机的历史，溯源至电力兴起之前。

Two WHO experts have arrived in China for cooperation on researching the origin of the COVID-19 virus.

两名世卫组织专家已抵达中国，就新冠肺炎溯源研究进行合作。

Often what looks like several unrelated product lines can be traced back to a single source.

几个看起来毫无关联的生产常常可以溯源到同一个源头。

WHO experts visited China twice to carry out cooperation on origin-tracing last year, respectively in February and July.

去年2月和7月，世卫组织专家两次来华展溯源合作。

The origins? Again, as many of these regional words are, quite unclear.

要追踪溯源的话，就像很多地方性语言一样，mardy的来源，我们还不是很清楚。

He adds that the U.S. should also create conditions for scientists all over the world to conduct origin-tracing cooperation.

他补充表示，美国也应该为全球科学家展溯源合作创造条件。

He wanted Quidditch Through the Ages back, to take his mind off his nerves about tomorrow.

他想把《魁地奇溯源》要回来，使自己的神经放松一下，不要老想着明天的比赛。

They have the West African ancestor of the virus, which is mild compared to the Central African one, it said.

他们感染的病毒可溯源至西非病毒，与中非病毒相比，这种病毒是温和的。

So we have to go to the roots.

所以我们必须追根溯源。