cretaceous 核心词议：
adj. 白垩纪的
n. 【地】白垩纪[系]
cretaceous 基本解释
速记方法知识扩展
词源考究
词源同crayon，石灰，粉笔。
cretaceous 变化形式
易混淆的单词： Cretaceous
中文词源：
Cretaceous 白垩纪的
词源同crayon, 石灰，粉笔。
cretaceous
精选例句
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。
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）。