When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家的四胞胎看见， “双壳贝！”

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其软不同的是,双壳贝缺乏齿舌,具有唇瓣,可将食由鳃送到口部.