Synapsids were one of the four main divisions of early reptilian life, the others being anapsids, euryapsids, and diapsids.

下孔亚是早期爬行动4要部之一，其他3部分别是缺孔亚、调孔亚和双孔亚。

So, once upon a time, were we.

我们从前曾经也是下孔亚动。

The synapsids divided into four streams, only one of which survived beyond the Permian.

下孔亚分成四支，只有一支闯过了二叠纪。

Synapsids had one hole in their lower temples; diapsids had two; euryapsids had a single hole higher up.

下孔亚在颞颥下部有1孔；双孔亚有2孔；调孔亚只有上部1孔。

The Dimetrodon was in fact a synapsid.

异齿龙实际上是一种下孔亚动。

So there's branchiopods, ostracods, copepods, cladocerans...and besides the crustaceans, there's a lot more.

有叶足动、介形亚动、桡足类动、类动....除了甲壳类动外，还有很多。这是真，还有很多。

The earliest armored fish we have fossils of is called Sacabambaspis, a member of the subclass known as Arandaspida.

我们拥有化石最早装甲鱼被称为 Sacabambaspis，它是 Arandaspida 亚成员。

All modern amphibians—frogs, toads, salamanders, and the legless caecilians—belong to the same subclass of animals known as the Lissamphibia.

所有现代两栖动——青蛙、蟾蜍、火蜥蜴和无腿盲肠动——都属于被称为 Lissamphibia 同一动亚。

And it's actually quite a small animal because contrary to all the famous theropods like the Tyrannosaurus, theropods started out as quite small animals.

与所有著名兽脚亚目恐龙（如霸王龙）相反，事实上，它是一种体型娇小动，因为兽脚亚动一开始是相当小。

In Conseil I had a seasoned specialist in biological classification, an enthusiast who could run with acrobatic agility up and down the whole ladder of branches, groups, classes, subclasses, orders, families, genera, subgenera, species, and varieties.

在康塞尔，我有一位经验丰富生分类专家，一位狂热生分类爱好者，他可以像杂技演员一样敏捷地在分支、类群、、亚、目、科、属、亚属、种和变种整阶梯上上下奔跑。