cretaceous
白垩纪
常用释义
英音[ krɪˈteɪʃəs ]
美音[ krɪˈteɪʃəs ]
基本释义
- adj. 白垩纪的；似白垩的
- n. 白垩纪；白垩系
例句
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1·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。
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2·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。
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3·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。
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4·Between the last layer of Cretaceous rock and the first layer of Cenozoic rock, there is often a thin layer of clay.在最后一层白垩纪岩石和第一层新生代岩石之间，常常有一层薄薄的粘土。
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5·Changes in climate before the Cretaceous period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.白垩纪以前的气候变化导致了海平面的剧烈波动，引发了恐龙的灭绝。
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6·Fifty-seven feet long and up to nine tons, spinosaurus started poking his head around the early Cretaceous some 100 million years ago.57英尺长，9吨重，棘龙在大约1亿年前的白垩纪早期就开始四处活动。
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7·At the end of the Cretaceous, the geological record shows that these seaways retreated from the continents back into the major ocean basins.地质记录显示，在白垩纪末期这些航道从大陆撤退，回到主要的海洋盆地。
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8·Data from diverse sources, including geochemical evidence preserved in seafloor sediments, indicate that the Late Cretaceous climate was very mild.来自不同来源的数据，包括保存在海底沉积物中的地球化学证据，都表明晚白垩世的气候非常温和。
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9·Data from diverse sources, including geochemical evidence preserved in seafloor sediments, indicate that the Late Cretaceous climate was milder than today's.来自不同来源的数据，包括存留在海底沉积物中的地球化学依据，表明晚白垩纪的气候比如今的要温和。
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10·Several other mass extinctions in the geological record have been tentatively identified with large impacts, but none is so dramatic as the Cretaceous event.地质记录中的其他几次大规模物种灭绝也被认为影响重大，但没有哪一次像白垩纪大灭绝那样夸张。
网络释义
- cretaceous period : 白垩纪
同义词
adj.
[岩]白垩纪的；似白垩的