The origins, though not the cause of Ebola-Sudan, can be traced back to a single individual in a Sudanese town.

苏丹埃博拉病毒最早可以追溯到苏丹小镇的一个人身上。

youdao

We know there were multiple dispersals out of Africa, but we can trace our ancestry back to a single one.

我们知道，非洲有多次向外界传播人口，但现在我们可以追溯自己的祖先，把他们归结到同一个来源。

youdao

According to planetary scientist Robin Canup, all three of Pluto's satellites could trace back to a single impact.

据行星学家罗宾·卡纳普说，冥王星的所有三个卫星可以追溯回同一次撞击。

youdao

So "The Back-Up Plan" is to become a single mother with the help of modern science.

VOA: standard.2010.04.30

And now, researchers have traced dozens of them back to a single city in North Africa, in fact, a single neighborhood.

NPR: Moroccan Village Funnels Suicide Bombers to Iraq

Today, though, Ameriquest's once huge national sales staff has been flashed back to a single, small call center, but there are still a lot of desperate Ameriquest customers.

NPR: Former Ameriquest Workers Tell of Deception

Using its bar code, investigators for the Food and Drug Administration have traced the bag back to a single spinach packager, Natural Selection Foods of San Juan Batista, Calif.

FORBES: FDA Seeks Root Of Spinach Problem