白垩纪的

Iguanodon was published in 1825. Iguanodon was living during Early Cretaceous and it was long as 4m.

曼特尔直到1825年才对他的发现进行描述，并将研究结果与化石交给伦敦皇家学会。1833年，吉迪恩·曼特尔发现了生活在白垩纪早期的林龙，林龙的体长可达4M。

Assuming a relatively constant rate of orchid evolution, the oldest common ancestor of the orchid family probably lived at least 76 million years ago, in the Late Cretaceous period.

假定兰花的进化过程一直保持一种相对稳定的水平，那么兰花家族最古老的共同祖先可能生活在距今至少7600万年前，即白垩纪晚期。

It underwent the collision event of the Southern China plate with the North China plate at early Triassic, overthrust napping event of continental, and continental spread structure event beginning at Cretaceous. I...

它已经历三迭纪早期华南陆块与华北陆块的碰撞事件、大陆逆掩推覆构造事件及后期白垩纪早期开始的大陆伸展构造事件，是我国华南陆块与华北陆块之间的重要过渡单元。

The tectonic evolution of southern Junggar basin can be classified into seven stages: stage of intracontinental rift from middle Periman to late Late Carboniferous; stage of weak extension and peneplane from late Permian to early Triassic; stable depression stage in middle-late Triassic; maximal basin formation phase in the setting of weak extension in early-middle Jurassic; inactive depressed basin formation phase in thrust setting in middle-late Jurassic; stable depression stage in Cretaceous and Eogene; foreland depressed basin formation phase in thrust setting in Neocene and Quaternary.

准噶尔盆地南缘晚石炭世以来盆地构造演化可划分为七个演化阶段：晚石炭世—中二叠世陆内裂谷作用阶段；晚二叠世到早三叠世处于弱伸展-稳定坳陷作用阶段；中、晚三叠世准平原化作用阶段；早、中侏罗世为弱伸展背景下广盆形成阶段；中、晚侏罗世冲断背景下的坳陷盆地形成阶段；白垩纪到古近纪弱伸展背景下的稳定坳陷盆地形成阶段；新近纪—第四纪为冲断背景下的前陆坳陷盆地形成阶段。

Recently polypod ferns have been demonstrated to undergo diversifications in the Cretaceous after the rise of angiosperms. To further test this proposal, an adaptive evolutionary analysis was performed on the rbeL gene sequences of Polypodiaceous ferns under models allowing w (nonsynonymous/synonymous rate ratio) to vary among sites.

为验证蕨类植物在白垩纪适应被子植物兴起而发生分化的观点，本研究以水龙骨科附生蕨类为对象，利用位点间可变ω（非同义替换率d和同义替换率d的比值）模型对其rbcL基因的适应性进化进行分析。

Jurassic age intraformational shales and claystones and Cretaceous regional claystones seal comprise the reservoirs.

在侏罗纪时期形成的页岩与泥岩以及在白垩纪时期形成的泥岩密封共同构成蓄水池的组成物质。

Large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; Upper Cretaceous; North America.

大型食肉两足恐龙，巨大的牙齿上有刀一样的锯齿；可能算是食腐动物更胜于一个主动的食肉动物；上白垩纪；北美洲。

It can be concluded that: First,primary deposit and placer deposit are two main deposits in this origin;Second,the primary deposit formed at hydrothermal stage and mesothermal stage between Presinian and Cretaceous;Third,the feature of ore body is wide and scattered on distributing,small on scale;Four,the storage capacity of the crystal is very abundant,its quality is fine,depth of burial is s.

通过对江苏东海区域成矿地质条件以及含晶石英脉成群成带分布规律的研究，得出以下结论：①该区水晶矿床为原生矿、砂矿两种类型；②水晶原生矿形成于前震旦纪以后到白垩纪以前的高、中温热液期；③矿体具分布广、规模小、分布散等特点；④东海水晶储量丰富、品位极高、埋藏浅，具有很好的开发利用前景。

They preyed on long-necked herbivorous dinosaurs on the indian subcontinent during the cretaceous period at the end of the dinosaur age, 65 million years ago.

他们以印度次大陆的食草恐龙为食，这种食草恐龙生活6500万年前的恐龙灭绝年代白垩纪。

West Liaoning of out country is a typical area for the study of the Jehol Biota ,where the fossil treasure-house of Mesozoic Era is rare in the world .

热河生物群是指距今一亿多年的白垩纪早期在我国北方、蒙古、西伯利亚、以及朝鲜和日本等地生活的古老生物群。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。