umbraculidae造句

例句与造句

1. The families Tylodinidae and Umbraculidae have large limpet-like external shells and a small mantle, while the species in the family Pleurobranchidae have a prominent mantle and an internal shell that becomes reduced or is lost in adults.
2. It's difficult to find umbraculidae in a sentence. 用umbraculidae造句挺难的