Some palaeontologists think them members of a phylum that is now extinct.

有的古生物学家认为它属于已经绝迹的一门动物。

They belong to the class Scyphozoa, in the phylum Cnidaria, which also includes corals.

它都是被分类为钵水母纲的动物，和珊瑚一样同属刺丝胞动物门。

Our last story today involves the phylum Echinodermata, which includes starfish, sea cucumbers and sea urchins.

今天节目的最后为你带来的是包括、及胆内的棘皮动物门。

Back in the Cambrian, new phyla and new classes arose. Nowadays we only get new species!

而寒武纪，新的门和新的纲不断产生。如今有新的种！”

There was all that stuff about 'oh fuck, another phylum' and I expect he regretted being famous for that.

他说过‘哦，真该死，这里面没有一个新的门呀！’这类话。估计他后悔因此出了名。”

" phylum" which makes 14 across " port-au-prince" see, " papa doc's capitol idea, " that's " port-au-prince." Haiti.

Phylum这样一来横14就是Port-au-Prince，瞧，提示是" Papa doc的首都" ，所以是太子港，地的。

For the smallest fry these are often rotifers, a phylum of tiny animals discovered in the late 17th century by early microscopists.

最小的鱼苗通常会喂食轮虫，轮虫是17世纪晚期由早期显微镜学家发现的一门微小动物。

Altogether, according to Gould, at least fifteen and perhaps as many as twenty of the Burgess animals belonged to no recognized phylum.

据古尔德说，布尔吉斯动物群当中，总共至少有15种，也许多达20种，不属于任何已经确认的门。

Above the size of L rotifers, however, farmers switch phylum and feed their charges crustaceans called brine shrimps, the smallest of which clock in at 400 microns.

然而，L号轮虫再往上，农民换了门，用一种被称为“盐水虾”的甲壳类动物喂食，最小的盐水虾长度有400微米。

Tardigrades, or more adorably known as water bears and moss piglets, are a phylum of small invertebrates that are bilaterally symmetrical and have four pairs of legs.

缓步动物，或更可爱地被称为水熊和苔藓仔猪，是一门小型无脊椎动物，它左右对称，有四对腿。