Is it because they have a single fenestra behind the eye?

是因为它们的眼睛后面只有一个窗孔吗？

Looking at this lower jaw of a Tyrannosaurus you can see a large opening called the mandibular fenestra.

观察霸王龙的下颌，您可以看到一个大开口，称为下颌孔。

Synapsids had one pair of openings in the skull, called a temporal fenestra, while the Sauropsids had two pairs.

合弓类动物的头骨上有一对开口，称为颞孔， 而蜥脚类动物有两对。

You, for example, have one pair of temporal fenestra in your skull, because you, my friend, are a synapsid.

例如，你的头骨上有一对颞孔，因为你，我的朋友，是突触。

Please tick the box over the antorbital fenestra.

请勾选眶前孔上方的方框。

Amniotes can be subdivided into several groups based on the number of holes or fenestra in the skull.

羊膜动物可以根据头骨上的孔或孔的数量细分为几个组。

And the other one, the laterotemporal fenestra.

另一个是后颞孔。

Not seen in this image, is the super temporal fenestra, which is located on the top of the skull here.

在这张图片中看不到的是位于颅骨顶部的超颞孔。

Now, look at the jar of the Pterosaur Anhanguera, and you can see that as in all Pterosaurs the mandibular fenestra has been lost.

现在，看看 Pterosaur Anhanguera 的罐子，你可以看到，在所有翼龙中，下颌孔已经丢失。

Behind the orbit is the lateral temporal fenestra.

眼眶后面是外侧颞窗。