noun 下载 🔗分享 层孔虫,叠层石。 Any of several fossil sponges, of the clade †Stromatoporoidea. Examples : "The geology student identified the bumpy, layered fossil as a stromatoporoid, an ancient type of sea sponge. " 地质系的学生辨认出那个表面凹凸不平、具有层状结构的化石是层孔虫,一种古老的海绵。 geology organism biology animal science 与AI对话词汇游戏阅读练习