Cretaceous
US /krɪˈteɪ.ʃəs/
UK /krɪˈteɪ.ʃəs/
形容词
白垩纪的
relating to the last period of the Mesozoic era, between the Jurassic and Tertiary periods, characterized by the dominance of dinosaurs and the appearance of flowering plants
示例:
•
Tyrannosaurus rex lived during the late Cretaceous period.
霸王龙生活在白垩纪晚期。
•
The Cretaceous extinction event led to the disappearance of non-avian dinosaurs.
白垩纪灭绝事件导致了非鸟类恐龙的消失。
名词
白垩纪
the Cretaceous period or system of rocks
示例:
•
Many chalk deposits were formed during the Cretaceous.
许多白垩沉积物是在白垩纪形成的。
•
The Cretaceous followed the Jurassic period.
白垩纪紧随侏罗纪之后。