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cretaceous

音标与读法

这里为大家介绍下cretaceous 是什么意思，希望能帮助到各位朋友。

adj.

白垩(质)的。 cretaceous period [system] 【地质学；地理学】白垩纪[系]。

〔C-〕【地质学；地理学】白垩纪[系]。

abounding in chalk

1.The cretaceous extinction was like a terrible streak of bad luck lasting millions of years .

白垩纪的生物绝灭，犹如一场持续千百万年的可怕厄运。

2.Only in the tropics were numerous late cretaceous groups extinguished during peaks in their evolution .

只是热带地区才有大批晚白垩纪生物类群正值其演化的极盛时期突然消亡。

3.The term is used at various localities in north africa, includes beds ranging from carboniferous to early cretaceous .

在北非不同的地方使用这个名称，包括从石炭纪到早白垩纪的地层。

4.The stippled area shows the distribution of a clean, permeable sandstone in the lower part of the lower cretaceous muddy formation .

图上画点部分为下白垩纪马迪组下部洁净，渗透的砂岩分布区域。

5.Extreme climates events in the cretaceous and paleogene

白垩纪至早第三纪的极端气候事件

6.Early cretaceous in age diagnosis yanosteus of middle size

鉴定特征体中等大小的燕鳄。

7.Upper cretaceous rudist bioherms in southwestern tarim

塔里木盆地西南地区上白垩统生物丘

8.The last dicynodont : an australian cretaceous relict

白垩纪的最后的二齿兽[论文摘要] ！！

9.Cretaceous - tertiary extinction event

白垩纪-第三纪灭绝事件

10.Cretaceous period , 145 million years ago , was the age of the dinosaurs

白垩纪期间, 145百万年前,是恐的年。

单词网dAnCi.583316.COm