There appeared to be little gene flow between the two groups, suggesting that they rarely interbred.

这两个群体之间的基因流通似乎很少，表明它们很少进行杂交。

Fifty thousand years ago is the approximate time humans and Neandertals interbred.

五万年前是人类和尼安德特人杂交的大概时间。

That's because about 40,000 years ago,certain human populations interbred with Neanderthals,meaning some people alive today have Neanderthal ancestors.

那是因为大约 40,000 年前，某些人类与尼安德特人杂交，这意味着今天还活着的一些人有尼安德特人的祖先。

And wherever the cats followed humans, they also interbred with the native wildcats already there.

在猫跟随人类的任何地方， 它们也会与当地的野猫杂交。

Of course, in their native habitat, wild Takhi had regularly interbred with domesticated horses for millennia, producing a population with much more diverse appearances.

当然，在它们的原生栖息地，野生蒙古马与家养马匹有规律地杂交了数千年，产生了一个外观更加多样化的种群。

Both groups are believed to have interacted a lot with Homo sapiens, or modern man, and are believed to have interbred with modern humans.

据说，这两个群体都与智人或现代人有过很多互动，并与现代人杂交过。

Significantly, this herd will be entirely free of cattle genes-unlike most existing buffalo herds in America, which have interbred with domestic cattle.

更为重要的是，这个群体将完全是纯种野生基因，而非像美国现存的许多野牛群，是与驯养的家牛杂交的后代。

Denisovans were related more closely to Neanderthals than to Homo sapiens, and subsequent analysis has shown that the two sometimes interbred.

丹尼索瓦人与尼安德特人的关系比与智人的关系更密切，随后的分析表明两者有时会杂交。

Erik Trinkaus of Washington University in St. Louis, the leading authority on Neandertals, announced the child to be a hybrid: proof that modern humans and Neandertals interbred.

圣路易斯的华盛顿大学的埃里克·特林考斯，一位研究尼安德特人最权威的学者，称这个小孩是一个杂种，是现代人和尼安德特人异种交配的证据。

They were afraidthat those two healthy products of two races that had interbred over the centuries would suffer the shame of breeding iguanas.

他们生怕这两个杂交了几个世纪的两个种族的健康产物会遭受养殖鬣蜥的耻辱。

Fifty thousand years ago is the approximate time humans and Neandertals interbred. And over the millennia, these Neandertal variants have become more common in some Homo sapiens populations than others.

五万年前是人类和尼安德特人交配的大致时间。几千年来，这些尼安德特人的变种在一些智人人群中变得比其他人更常见。

This tells us Homo sapiens shared a romantic campfire with Neanderthals and interbred, probably right after our species left Africa, spreading that Neanderthal DNA as we settled the rest of the globe.

这告诉我们智人与尼安德特人在浪漫的篝火下交配，就在我们的物种离开非洲后，当我们在全球其他地区定居时传播了尼安德特人的 DNA。

More relevant from a present-day perspective is that both also interbred with Homo sapiens when that African species began turning up in their European and Asiatic homelands 70,000 years or so ago.

从今天的角度来看，更相关的是，当非洲物种在大约7万年前开始出现在他们的欧洲和亚洲家园时，两者都与智人杂交。