腹足类的一个很大的目，包含单壳软体动物，有一个梳状鳃。

Large order of gastropods comprising univalve mollusks that have a single gill resembling a comb.

youdao

腹足类的一个很大的目，包含单壳软体动物，有一个梳状鳃。

Large order of gastropods comprising univalve mollusks that have a single gill resembling a comb.

youdao