Retiolitidae
细网笔石科
🗣️ 情景例句
Exploring outer space is a challenge to mankind.
探索外层空间是一项向人类发出的挑战。
How often did I tell you not to yell in the house?
我告诉你多少次不要在房子里大叫?
As a result of these wars and diseases, the Maori population fell from 100,000 to 42,000.
由于这些战争与疾病，毛利人的人口从100，000人下降到4，200人。