We belong to a class of organisms called deuterostomes.

我们属于后口动物。

We’re all what biologists call deuterostomes, a classification that has to do with how we develop as embryos.

我们都是生物学家所说的后口动物，这种我们作为胚胎的发育方式有关。

In fact, the earliest deuterostomes might share common traits like openings that they used to help with filter feeding.

事实上，最早的氘口有共同的特征， 例如它们用来帮助滤食的开口。

The most widely-used definition of deuterostome has to do with how our mouths and — the SciShow comments’ favorite term — anuses develop.

最广泛使用的后口动物定义我们的嘴巴和——SciShow 评论最喜欢的术语——肛门的发育方式有关。

So, these scientists think S. coronarius could be one of the earliest deuterostomes, based on comparisons of more than 60 features to other living creatures and fossils.

因此，这些科学家认为 S. coronarius 是最早的后口动物之一，基于其他生物和化石的 60 多种特征的比较。