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strata

TPO词频:19次
strata

['strætɚ]


【释义】

基本释义 n. 层

常考释义 n. 层

n. 层;地层

【TPO例句】

1. It is not surprising, therefore, that the highest ratio of oil and gas pools to volume of sediment is found in rock no older than 2.5 million years - young enough so that little of the petroleum has leaked away - and that nearly 60 percent of all oil and gas discovered so far has been found in strata that formed in the last 65 million years .(TPO43-P2)

因此也就不奇怪,油藏和气藏的数目与沉积物的总量相比,最高的比例出现在年龄不超过250万年的沉积岩中——岩石还较新,所以只有很少的石油泄露——而迄今发现的近60%的石油和天然气都出现在过去6500万年形成的地层中。

2. When archaeologists are digging at a site, they make very careful notes about which stratum (strata), which layer of earth they find things in. (TPO17-L1)

当考古学家在发掘某个坑位时,他们会很注意文物出土的地层,即文物是从地表的哪一个层面被发掘出来的。

3. He later worked on similar jobs across the length and breadth of England, all the while studying the newly revealed strata and collecting all the fossils he could find. (TPO6-P2)

后来他仍从事类似的工作,行遍全国,不断地研究那些新出现的地层,同时收集他所能发现的化石。

4. In 1815 he published the first modern geological map, “A Map of the Strata of England and Wales with a Part of Scotland,” a map so meticulously researched that it can still be used today.(TPO6-P2)

1815年,他绘制了第一张现代地质学地图——《英格兰、威尔士及部分苏格兰地区地层地图》,这张地质地图绘制得非常精确,直到现在仍有参考价值。

5. Ever since people had begun to catalog the strata in particular outcrops, there had been the hope that these could somehow be used to calculate geological time. (TPO6-P2)

从人们开始对露出地面的特殊岩层进行分类的时候起,大家就开始认为这些岩石可能会以某种方式被用于计算地质年代。

6. But as more and more accumulations of strata were cataloged in more and more places, it became clear that the sequences of rocks sometimes differed from region to region and that no rock type was ever going to become a reliable time marker throughout the world. (TPO6-P2)

但是,随着各地越来越多的岩层的积累和分类,岩层顺序也因地区的不同而不同,因此,全世界没有一种特定的岩层能被认作是划分地质年代的标志。

7. As he collected fossils from strata throughout England, Smith began to see that the fossils told a different story from the rocks. (TPO6-P2)

史密斯在全英国的岩层中不断搜集化石,后来他发现化石所反映的史实和岩石反映的完全不同,

8. Particularly in the younger strata, the rocks were often so similar that he had trouble distinguishing the strata, but he never had trouble telling the fossils apart. (TPO6-P2)

尤其是那些新产生的地层里的岩石,这些岩石非常类似,不易于区分地层。

9. While rock between two consistent strata might in one place be shale and in another sandstone, the fossils in that shale or sandstone were always the same. (TPO6-P2)

而区分其中的化石对史密斯来说简直就是轻而易举。

10. Some fossils endured through so many millions of years that they appear in many strata, but others occur only in a few strata, and a few species had their births and extinctions within one particular stratum. (TPO6-P2)

在同一地层中发现的岩石可能在这片地层中属于泥板岩,而在另一片地层中可能是砂岩,而在那些泥板岩或者砂岩中的化石往往都是一样的。

11. Not only could Smith identify rock strata by the fossils they contained, he could also see a pattern emerging: certain fossils always appear in more ancient sediments,  while others begin to be seen as the strata become more recent. (TPO6-P2)

史密斯不仅可以通过岩石中包含的化石来识别地层,而且可以看出他们显露出来的模式:一些特定的化石往往出现在更为久远的沉积物当中,而其他的化石则可以在距今年代较近的地层中发现。

12. By following the fossils, Smith was able to put all the strata of England's earth into relative temporal sequence.  (TPO6-P2)

通过追踪化石,史密斯将英国范围内所有的地层进行了彼此出现时间的排序。

13. Limestone may be found in the Cambrian or—300 million years later—in the Jurassic strata, but a trilobite—the ubiquitous marine arthropod that had its birth in the Cambrian—will never be found in Jurassic strata, nor a dinosaur in the Cambrian.(TPO6-P2)

人类有可能在侏罗纪时期的地层中发现寒世纪或者3亿年后的石灰岩,但绝不可能在侏罗纪时期地层中发现三叶虫化石(三叶虫是寒武纪非常普遍的水生节肢动物),也不可能发现寒武纪时期的恐龙化石。

n. 社会阶层

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