Almost all marine gastropods breathe with a gill, but many freshwater species, and the majority of terrestrial species, have a pallial lung.
These gastropods breathe with gills.Some freshwater species and almost all terrestric species have developed lungs.
These gastropods breathe with gills.Some freshwater species and almost all terrestric species have developed lungs.
为简单起见重写这句话: Almost all marine gastropods breathe with a gill, but many freshwater species, and the majority of terrestrial species, have a pallial lung. 输出: