如何使用 "cretaceous" 造句

1. 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。
2. 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。
3. 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。
4. 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。
5. 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)。