| 释义 |
the cretaceous 英ˌðəkrɪ'teɪʃəs美ˌðəkrɪ'teɪʃəs 短语³⁴¹⁷¹
基本例句
白垩纪或其岩石
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
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
Deeper— or shorter—snouts may have evolved in concert with a more powerful bite and smaller forearms in tyrannosauroids in western North America and Asia, which were connected during the Cretaceous.
对北美西部和亚洲的霸王龙来说，较深或者较浅的口鼻部是伴随更有力的咬合力和更短的前臂一同进化的，这个过程应该发生在白垩纪时期。 yeeyan
During the cretaceous, three kinds of basin, the Huobashan type, the luoyang type and the Xingjiang type , are formed in the northeast of Jiangxi province.
白垩纪，赣东北形成了火把山型、罗塘型和信江型三种不同类型的沉积盆地。 cnki
From the Cretaceous to Tertiary, fault sealing built up with thickening of the overlying strata.
白垩纪至第三纪，随上覆地层增厚，断层封闭性增强。 cnki
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
This paper deals with the present situation, prospect and significance of the research for continental Cretaceous red beds to reconstruction of paleoclimate in the Cretaceous period.
介绍了白垩纪陆相红层研究的现状及前景，特别是其在白垩纪陆相古气候恢复方面所具有的重要意义。 dictall
The present paper deals with the measurements and variations in palaeowind direction of the Cretaceous desert in the Sichuan Basin.
本文报道了四川盆地白垩纪沙漠古风向测量结果，总结了风向变化的规律。 dictall |