Dimorphostroma
双形叠层石
🗣️ 情景例句
Mrs. Greenberg is on the phone.
Greenberg太太打电话来。
How long will you remain in the United States?
你将会在美国逗留多久？
They decompose and are quickly destroyed by the weather or eaten by some other creature.
因为它们腐败之后很快就被风化掉，或被别的动物吃掉了。