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。

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。

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

在过去，科学家认为我们的直系祖先是制造和使用工具的人。

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。

So we can't claim Dimetrodon as our direct ancestor.

所以我们不能说异齿龙是我们的直系祖先。

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。

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

奥德可能是当今冰岛许多人的直系祖先。

However, the wolf is likely not a direct ancestor of grey wolves living in the region today.

然而， 这只狼很可能不是今天生活在该地区的灰狼的直系祖先。

The Associated Press reported that Mr. Berger said his team is not claiming that Homo naledi was a direct ancestor of modern-day people.

据美联社报导，伯杰先生表示，他的研究小组并未称“智人之星”是现代人类的直接祖先。

She's not exactly our direct ancestor, but she's an animal a lot like our ancestor that we know a lot about.

她不完全是我们的直系祖先，但她是一种很像我们祖先的动物，我们对此了解很多。

The new estimate means the species represented by the skull was unlikely to have been a direct ancestor of Homo sapiens, the species of human that exists today.

新估算意味着头骨代表的物种不太可能是智人的直接祖先，智人是今天存在的人类物种。

He told the Associated Press that he thinks the find adds to existing evidence that our direct ancestors may not have been the only users of Stone Age technology.

他告诉美联社，他认为这一发现增加了现有证据，证明我们的直系祖先可能并不是石器时代技术的唯一使用者。

She (if " she" she be) is now classified as the first discovered adult specimen of Australopithecus, the direct ancestors of Homo, the genus of modern humans.

她（如果是“她” 的话）现在被归类为第一个发现的南方古猿成年标本，南方古猿是现代人属的直系祖先。

The paper authors say that these fossils are early Homo sapiens, and most scientists seem to agree that these are our direct ancestors, at the very least.

论文作者说这些化石是早期智人，而且大多数科学家似乎都同意这些化石至少是我们的直系祖先。

So it's not too hard to see why a lot of paleontologists thought that pareiasaurs were closely related to turtles — and were maybe even their direct ancestors.

因此，不难理解为什么许多古生物学家认为翼龙与海龟密切相关——甚至可能是它们的直系祖先。

But if that's true then this little guy may be our direct ancestor and those little cells may be the things that evolved, over hundreds of millions of years, into our eyes.

如果真是这样的话，那么皮卡虫就会是我们的祖先，而这些感光细胞到了后来经过了数亿年的进化，变成了我们的眼睛。