白垩的

Based on the study of biostratigraphy and anoxic eventstratigraphy, we propose that the Qingshankou Formation may correspond to the oceanic anoxic event at the CenomanianTuronian boundary in the Cretaceous, and the age of the Qingshankou Formation in the Songliao Basin is the Late Cenomanian to the Early Turonian.

结合生物地层研究成果，认为青山口阶下部曾发生过古湖泊缺氧事件，其层位大体可与白垩纪古海洋CenomanianTuronian界线事件层进行对比，由此提出了松辽盆地青山口阶下部的时代归属于晚白垩世Cenomanian晚期-Turonian早期的新观点。

Where chalkstone was of poor quality, better stones had to be used at the building corners and openings.

白垩块质量很差，质量好的石头都用于建筑的角落和通道。

His fingernails, too, were so pale they looked almost chalky.

他的手指甲也是惨白惨白的，活像白垩一般。

This inland plain, once a ridge of chalk upland, but now eroded, is largely denuded of the trees---mainly oaks---which covered it so densely during the Middle Ages, and which were a seemingly inexhaustible source of timber until they succumbed in later centuries to the charcoal burner and the builder.

这内陆平原，曾经是一座白垩质高地的脊背，但是现在已被腐蚀风化，那些树木已基本上被剥光——-主要是栎树——-如此在那中世纪年代浓密复盖住这块平原。这原先好像是取之不竭木材的源头，直至在几个世纪后期才屈从给烧炭者和建筑工人。

CHATELAINE DE BROULEYEleads a twenty five hectares wide vineyard on clayey chalk soils around the town of BEYCHAC ET CAILLAU.

坐落在BEYCHAC ET CAILLAU小镇四周的一个宽为25公顷的葡萄园区之中，其泥土为粘质白垩土壤。

The phase of rift basin formed the primary source rocks and reservoir and seal. Triassic-Jurassic Pucara Group and Cretaceous Chonta Formation generated a mass of hydrocarbons in Paleocene-Eocene (60-45Ma) and Miocene (15-5Ma), respectively.

盆地内主要的烃源岩及储、盖组合均发育在裂谷盆地阶段，三叠系—侏罗系Pucara群和白垩系Chonta组2套主要烃源岩的排烃高峰期分别是古新世—始新世（距今60～45 Ma）和中新世（距今15～5 Ma）。

Groundwater system of Cretaceous system of Ordos basin in terms of system of water-bearing stratum of groundwater was divided and analysesed.

从地下水含水层系统的角度对鄂尔多斯盆地白垩系地下水系统进行了划分和分析。

Wiltshire includes the Avebury Stone Circle, Salisbury Plain, and Stonehenge, as well as nine white chalk horses carved into hillsides.

威尔特郡包括埃夫伯利石圈阵、萨利平原和巨石阵，并且这里有九匹白色的白垩马雕刻在山坡上。

They correspond respectively to two phases of extensional activities in Late Cretaceous and Eogene as well as development of the Qianshan fault-controlled basin to the east of the Tan-Lu fault zone.

这两次快速冷却事件分别对应于断裂带晚白垩世、古近纪两次伸展活动，并控制发育了断裂带东侧的潜山断陷盆地。

The applications of various isotope-dating techniques have indicated that the Jehol Biota belongs to the Early Cretaceous, living on earth for around 20 million years.

同位素测年技术的广泛应用，表明热河生物群属于早白垩世，在地球上延续了大约2千万年。

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。