Among the most popular: paternity and kinship testing , which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption.

最受欢迎 DNA 测试父和血缘关系检测，被收养可以利用它找到自己血缘亲属，家庭也可以用它追踪到被收养。

Because...I don't know. It's weird...going your whole life thinking you're related by blood to someone.

因为......我也不知道。感觉很怪，一直以来都以为我和你们有血缘关系。

Researchers from the University of California have analyzed gene variation in around 2000 people, comparing pairs of unrelated friends with pairs of unrelated strangers.

加利福尼亚大学研究人员分析了2000人左右基因变异，同时，将没有血缘关系朋友和没有血缘关系陌生人比较。

This way, the surrogate wouldn't be some impersonal incubator. There'd be a family tie.

这样话，代就不会那些毫无亲情婴者了。有血缘关系。

So imagine their surprise when they discovered they were in fact biological brothers.

所以，你可以想象，他们发现彼此有血缘关系兄弟时有多惊讶。

It would be just like Greg, and then Greg and I really are more related.

就像格雷格一样，然后我和格雷格才真有血缘关系。

He had never thought of it before, taking for granted the tie of their blood.

这一点他以前从未想到过，他们血缘关系当作理所当然。

Your mother's sacrifice made the bond of blood the strongest shield I could give you.'

你母亲牺牲使得血缘纽带成为我能够给你最强大保护屏。”

While it's virtually absent in even closely related lowland neighbors.

但那些居住在低地、甚至与高地居民有密切血缘关系邻居却几乎没有。

Someone that's related to you is your own flesh and blood.

和你有血缘关系人就你骨肉亲人。

We don't usually use this to talk about people who aren't related.

我们通常不用这个来描述没有血缘关系人。

If I ask 100 people what the idiom means, most, if not all, will say that it means family relationships are the most important. The blood you share with your relatives represents a strong relationship. We call these family ties.

如果我问100个人这个习语什么意思，即便不所有人，大多数人也会说这表明家庭关系最重要。你和你亲属共有血缘关系有一种牢固关系。我们称之为家庭纽带。

Even those who weren't related to Perry came to feel a familial bond. He truly was family to me, Spelling says. A protector and a brother.

甚至那些与佩里没有血缘关系人也开始感觉到一种家庭纽带。“他真我家人，”斯佩林说。“一个保护者和一个兄弟。”

Now, what I think is the coolest thing about iridescence is how completely distantly related animals can sort of stumble on the same physics for making color.

我认为彩虹色最酷地方，在血缘关系很远动物身上会偶然发现相同产生颜色物理原理。

Whether the fact that the languages are similar means that the people who speak them are actually distant relatives we don't yet know for sure.

但不这些民族只语言相似或者这些民族中某些有血缘关系远亲，对此人们不了解任何确切情况。

In their defense, immigration officials said they would only separate families if the mom was unfit to care for their offspring or if they couldn't prove parentage.

移民官员曾辩护称，只有在母亲不适合照顾或在无法证明血缘关系情况下，他们才会将与家人分离。

The research reopens the question of why these remarkably vocal marine mammals would use their precious resources to feed pups that aren't related to them.

为什么这些声音非常响亮海洋哺乳动物会使用它们宝贵资源来喂养与它们没有血缘关系幼崽。

It was then she first mentioned the idea of an annulment on the grounds of consanguinity, that they were too closely related.

正在那时，她第一次提出了以血缘关系为由废除婚姻想法，因为他们血缘关系太近了。

That, for us, is fascinating, because a whole group of unrelated cats...we just wouldn't necessarily expect that at all.

这在我们看来很神奇，因为对于几只没血缘关系猫猫来说，我们从没想过会出现这种情况。

Well, let's hear from New York City actress and playwright, Sarah Jones, talking about her complicated ethnicity.

我们来听听纽约市女演员兼剧作家萨拉·琼斯讲述她复杂种族血缘。