| 释义 |
cretaceous period短语⁷⁹⁹⁷⁸⁺⁹
基本例句
白垩纪
The assembled family tree shows that lice started to radiate into new species well before the end of the Cretaceous period, Dr. Smith and his colleagues report in the current issue of Biology Letters.
史密斯博士和他同事在《生物学快报》上发文指出，建立起的系统树表明在白垩纪末期之前虱子早就开始进化出不同的新物种。 yeeyan
They died out, along with the dinosaurs and many other creatures, at the end of the Cretaceous period,65m years ago, when the Earth was hit by an asteroid.
在6千5百万年前的白垩纪晚期，当地球遭到一枚小行星撞击后，鹦鹉螺和恐龙以及其他生物一起灭绝了。 ecocn
Fossils of Caproberyx indicate they swam the waters of Europe and Africa during the Cretaceous period.
多骨刺鱼的化石显示白垩纪时它们在欧洲和非洲的水域中游弋。 www.ngfans.com.cn
It lived in the cretaceous period of history.
它生存于白垩纪时代。 www.funshare.com.cn
Not exactly outer space then, or the Cretaceous period.
而并不是外太空或是白垩纪。 yeeyan
Scientists believe that during the Cretaceous period, a spate of volcanic activity caused plant life to bloom on the surface of the oceans.
科学家认为，在白垩纪，一连串的火山活动导致植物在海平面生长旺盛。 yeeyan
Some65.5m years ago, at the end of the Cretaceous period, the Earth collided with an asteroid and the biggest terrestrial beasts in history were no more.
大约在6500万年前的白垩纪末期，地球与小行星相撞导致最大的陆地兽类全部灭绝。 ecocn
This65.5- million-year- old layer of Earth separates fossils of the Cretaceous period from those of the Tertiary period.
这个有着6550万年历史的地层分离了白垩纪的化石和第三纪的化石。 yeeyan |