alaoceras造句

例句与造句

1. "Alaoceras " is characterized by its generally subdiscoidal shell with moderately involute whorls and a wide or moderately wide umbilicus, ornamented with sharply defined lamellae, very weak and sometimes disappearing lirae, and elongated protuberances on the umbilical wall.
2. It's difficult to find alaoceras in a sentence. 用alaoceras造句挺难的