Large order of gastropods comprising univalve mollusks that have a single gill resembling a comb.
腹足类的一个很大的目，包含单壳软体动物，有一个梳状鳃。
I lifted it and found the repulsive, tacky foot of the univalve protruding, still covered with sand.
我举起了它而且发现单壳软体动物凸出的逐退又发黏脚，仍然以沙子涵盖。
I lifted it and found the repulsive, tacky foot of the univalve protruding, still covered with sand.
我举起了它而且发现单壳软体动物凸出的逐退又发黏脚，仍然以沙子涵盖。
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