"cretaceous" in Chinese (Simplified)
白垩纪
Definition
指的是大约1.45亿到6600万年前的地质时期,那时恐龙十分繁盛,并且有众多白垩(石灰)沉积形成。
Usage Notes (Chinese (Simplified))
主要用于科学和教育领域,尤其是地质学和古生物学。指地质时期时首字母大写(“白垩纪”);作形容词时一般为小写(“白垩纪岩石”)。常见搭配:“白垩纪时期”。
Examples
Many famous dinosaurs lived during the Cretaceous period.
许多著名的恐龙生活在**白垩纪**时期。
The Cretaceous ended about 66 million years ago.
**白垩纪**大约在6600万年前结束。
Scientists study Cretaceous rocks to learn about Earth’s history.
科学家研究**白垩纪**岩石以了解地球历史。
Did you know flowering plants first appeared in the Cretaceous?
你知道开花植物是**白垩纪**才首次出现的吗?
There are many Cretaceous fossils on display at the museum.
博物馆里展出了许多**白垩纪**化石。
That cliff is made mostly of Cretaceous chalk deposits.
那座悬崖主要由**白垩纪**的白垩沉积物组成。