We belong to a class of organisms called deuterostomes.

我们属于后口动。

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

我们都学家所说的后口动，这种分类与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，最早的氘口可能具有共同的特征， 例如它们用助滤食的开口。

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定义与我们的嘴巴和——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 可能最早的后口动之一，基于与其他和化石的 60 多种特征的比较。