Trilobites have no direct descendants, but their evolutionary cousins are alive and well.

三叶虫没有直系的后代，但它们在演化上的表亲现在仍然活得很好。

It was not a direct ancestor of the millipedes that live now.

它并不是现代千足虫的直系祖先。

Well, modern-day dogs are actually their direct descendants.

现代的狗其实是它们的直系后代。

Aud may be a direct ancestor of many people in Iceland today.

奥德可能是今天冰岛许多人的直系祖先。

Members of my immediate family live in Ghana and the United Kingdom.

我的直系亲属住在加纳和英国。

This is the direct technological ancestor of the cameras that we use today.

这是我们如今使用的摄像机技术层面上的直系祖先。

A close family means your immediate family or people you often see.

近亲是指你的直系亲属或你经常见到的人。

Four generations back, your direct ancestors total 30.

往前推四代，你的直系祖先总共有 30 个人。

Kepler's data reveals planets' sizes as well as their distance from their parent star.

Kepler的數據揭示了行星的大小以及它们与直系恒星之间的距离。

Part three: talking about your immediate and your extended family.

论你的直系亲属和大家庭。

When we talk about our 'own flesh and blood', it refers to our immediate family.

当我们论“自己的骨肉”时，指的是我们的直系亲属。

In the past, scientists thought our direct ancestors were the ones making and using tools.

在过去，学家认为我们的直系祖先是制造和使用工具的人。

Hence the origin of the right of primogeniture, and of what is called lineal succession.

因此，长子继承权和所谓的直系继承权的起源。

It was, you know, six feet apart mass, couldn't have guests beyond your immediate family.

你知道，那是一个相隔六英尺的地方，除了你的直系亲属之外不能有别人。

He was the Mongolian leader of the Persian territories, and a direct descendent of Genghis Khan, as well.

他是波斯领地的蒙古领导人，也是成吉思汗的直系后裔。

It is not considered a direct ancestor of today's giraffe, but rather a side development of the giraffe family.

人们认为它不是现代长颈鹿的直系祖先，而是长颈鹿家族的旁系。

It goes to her next of kin.

由她的直系亲属继承。

We're direct descendants of the Qing Dynasty.

我们是清朝皇家的直系后裔。

They're not direct descendants of the likes of Tiktaalik.

他们不是提塔利克等人的直系后裔。

This dinosaur isn’t a direct ancestor of birds, though.

不过，这种恐龙并不是鸟类的直系祖先。