We belong to a class of organisms called deuterostomes.

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.

是生物学家所说后口动物，这种分类与作为胚胎发育方式有关。

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

事实上，最早氘口可能具有共同特征， 例如它用来帮助开口。

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

最广泛使用后口动物定义与嘴巴和——SciShow 评论最喜欢术语——肛门发育方式有关。

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 可能是最早后口动物之一，基于与其他生物和化石 60 多种特征比较。