Cardioceras

例句：

1. 1.The Cardioceras fossil is a rare find in the region.
   心形虫化石是该地区的罕见发现。
2. 2.The study of Cardioceras has revealed new insights into the evolution of life on Earth.
   对心形虫的研究揭示了关于地球上生命进化的新见解。
3. 3. The discovery of Cardioceras has sparked debate about the origins of life on Earth.
   心形虫的发现引发了关于地球生命起源的辩论。