cercomonad

例句：

1. 1.The cercomonad was a fascinating creature that lived in the deep sea.
   这种深海生物是一种令人着迷的生物。
2. 2.The cercomonad was a mysterious creature that had never been seen before.
   这种深海生物是一种从未见过的神秘生物。
3. 3.The cercomonad was a fascinating creature that had never been seen before.
   这种深海生物是一种令人着迷的生物。