cretaceous
核心词议：

速记方法


知识扩展
词源考究 词源同crayon，石灰，粉笔。

中文词源： Cretaceous 白垩纪的 词源同crayon, 石灰，粉笔。 cretaceous
精选例句

常见考点例句：

That means that our record of balaur is restricted to the very end of the cretaceous .

这意味着我们有关巴拉乌尔龙的记录限定于白垩纪的晚期的晚期。

One confounding factor is that the late cretaceous was also a period of great volcanic activity .

令人生疑的一个因素是，白垩纪末期也是个火山剧烈活动的时期。

Longhu mountain , located in the xinjiang basin , records the geological evolution of the cretaceous period .

龙虎山--位于信江盆地，记录了该区域白垩纪时期的地质演化。

While in australia , she sampled bones from 18 different dinosaurs that lived in the antarctic circle during the early cretaceous period .

在澳大利亚，她研究了18种不同恐龙的化石样本，这些恐龙在早白垩纪都生活在南极圈以内。

That date marks one of five recognised mass extinctions in history ( the end of the cretaceous was another ) .

历史公认的5次物种大灭绝事件之一就是以三叠纪末期为标志的（另一次发生在白垩纪末期）。