the Cretaceous period 白垩纪 ; 白垩纪时期
Cretaceous Period 白垩纪 ; 生活在白垩纪时期
Cretaceous Research 白垩纪研究
Early Cretaceous 早白垩纪
Lower Cretaceous 白垩纪早期
Late Cretaceous 晚白垩世
cretaceous transgression 白垩纪海进
Upper Cretaceous 白垩纪晚期 ; 上白垩统
同义词： Cretaceous period
以上来源于: WordNet
ADJ of, denoting, or formed in the last period of the Mesozoic era, between the Jurassic and Tertiary periods, lasting 80 million years during which chalk deposits were formed and flowering plants first appeared 白垩纪的
N the Cretaceous period or rock system 白垩纪或白垩纪岩石系统
These animals were not as sensitive to climate changes in the Cretaceous period as they are today.
这些动物在白垩纪对气候变化不像今天这样敏感。
Scientists have linked the mass extinction at the end of the Cretaceous with a meteorite impact on Earth.
科学家将白垩纪末期的大灭绝与地球上的陨石撞击联系起来。
This change in plankton found in marine deposits is what marks the boundary between the Cretaceous and the Tertiary.
海洋沉积物中浮游生物的这种变化标志着白垩纪和第三纪的分界线。
These creatures lived more than sixty-five million years ago, during Earth's late Cretaceous period.
VOA: special.2010.10.05
Scientists say it formed when high sea levels flooded the middle of North America, splitting the continent in two for millions of years during the late Cretaceous period.
VOA: special.2010.10.05
The Tyrannosaurus lived in North America during the late Cretaceous Period.
VOA: special.2009.09.01
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