ciliiform

例句：

1. 1. The ciliiform protochordate is the first animal to appear on Earth.
   无脊椎动物原虫是地球上出现的第一个动物。
2. 2.The ciliiform protochordate is a fascinating creature that has yet to be fully understood.
   无脊椎动物原虫是一种令人着迷的生物，其尚未被完全理解。
3. 3.The discovery of ciliiform protochordate fossils in Antarctica has sparked debate about the origins of life on Earth.
   在南极洲发现无脊椎动物原虫化石引发了关于地球生命起源的辩论。