One was the sauropsids, which would include reptiles, dinosaurs, and birds.

一种是蜥脚类动物，包括爬行动物、恐龙和鸟类。

Fossil evidence shows that early synapsids radiated much more quickly than their sauropsid cousins.

化石证据表明，早期的突触动物比它们的蜥脚类表亲辐射得更快。

They probably out-competed the sauropsids by being more adaptable and specializing more quickly to take advantage of food sources.

他们可能通过更具适应性和更快地专业化以利用食物来源来击败蜥脚类动物。

After the vast majority of the synapsids went extinct the sauropsids had come out on top by the mid-Triassic.

在绝大多数合弓类动物灭绝后，蜥脚类动物在三叠纪中期出现了。

Like sauropsids, early synapsids probably laid primitive amniote eggs with flexible shells, but there's no fossil evidence of their eggs either.

像蜥脚类动物一样， 早期的合弓类动物可能会产下带有柔软外壳的原始羊膜动物卵，但也没有关于它们卵的化石证据。

And the sauropsids and the synapsids put their own spins on the amniotic egg, ones that we can see today in living birds, like the chicken!

蜥脚类动物和合弓类动物将它们自己的自旋放在羊膜卵上，我们今天可以在现存的鸟类（如鸡）身上看到这些！