stratum

noun

1. 层；岩层；地层
   a layer or set of layers of rock, earth, etc.
2. 阶层
   a class in a society
   1. people from all social strata
      来自不同社会阶层的人

1. N-COUNT 社会阶层
   A stratum of society is a group of people in it who are similar in their education, income, or social status.
   1. It was an enormous task that affected every stratum of society...
      这是一项影响到社会各阶层的重大工作。
   2. The rebels came overwhelmingly from the poorest strata of rural society.
      叛乱分子绝大多数来自农村的最贫困阶层。
2. N-COUNT 岩层
   Strata are different layers of rock.
   1. Contained within the rock strata is evidence that the region was intensely dry 15,000 years ago.
      岩层中有证据表明，该地区在 15,000 年前曾经非常干旱。

1. It was an enormous task that affected every stratum of society
   这是一项影响到社会各阶层的重大工作。
2. The rebels came overwhelmingly from the poorest strata of rural society.
   叛乱分子绝大多数来自农村的最贫困阶层。
3. Tramps are from the lowest stratum of society.
   流浪汉来自社会最下层。
4. And it also can remain in the stratum corneum, exacerbating irritation.
   而且它还会遗留在角质层中，加剧对肤质的刺激。
5. They do not constitute a separate class or stratum.
   知识分子和青年学生并不是一个阶级或阶层。
6. Theory of key stratum in ground control.
   岩层控制的关键层理论。
7. The permeability barrier is located in the outermost layer of the epidermis, the stratum corneum.
   这层通透性屏障位于表皮的最外层-角质层。
8. Both inhibition of cell mitosis, can effectively penetrate into the stratum corneum.
   同时具有抑制细胞有丝分裂的作用，能有效地渗透进皮肤角质层。
9. An identical soil stratum may exhibit elasticity, elasto-plasticity or visco-elastoplasticity under different modes of groundwater changing.
   同一土层在不同的水位变化模式下可表现为弹性、弹塑性或粘弹塑性的变形特征；
10. A layer of rock with a particular composition ( especially of fossils); for dating the stratum.
    具有特殊成分，尤其是化石的一层岩石；可用来确定地层的年代。
11. In digging the well, the men struck first a stratum of sand, then several strata of rock.
    在挖井时，他们先挖掘到一层砂，之后是几层石头。
12. This is a stratum we must win over.
    这一阶层，我们是必须争取的。
13. Strengthens the stratum corneum cells in the fat layer to effectively resist the stimulation from sunlight and air pollution.
    增加脂肪层之角质层细胞，加强抵抗阳光和日常污浊空气带来之刺激。
14. Effect of elastic modulus of stratum and cement sheath on casing strength
    地层和水泥环弹性模量对套管强度的影响分析
15. Let us choose a particular social stratum.
    让我们挑选某个特定的社会阶层。
16. They represent each society stratum.
    他们代表各个社会阶层。
17. An aquifer is a water-bearing rock stratum such as sandstone and chalk.
    地下蓄水层是一些有水的岩石层，如沙岩和白垩岩。
18. The second migration power include buoyancy and tectonic activity, which controlled by stratum dip and faulting.
    二次运移的动力包括浮力和构造活动力，其主要影响因素是地层倾角和断裂活动强度。
19. The stratum corneum is composed of dead cells surrounded by lipid membranes which mediate the permeability barrier.
    角质层主要由围绕脂膜分布的死细胞构成调节通透性的屏障。
20. It concludes the stratum situation and economic relationships in Britain in her century.
    它的结论是地层情况和经济关系，在英国，在她的世纪。
21. A thin layer or stratum, as of coal or rock.
    薄薄的一层或层面，如煤或岩石的。
22. They found a stratum of coal thick enough to be mined with profit.
    他们发现了含有厚到可以开采并获利的煤矿的地层。
23. The chapter analysed two important concepts of the study of social stratification, class and stratum.
    此章主要分析了社会分层研究中的两个重要概念&阶级和阶层。
24. The stratum of main source rock among the marine facies is the upper Sinian and the Paleozoic group.
    其中海相地层中的主力烃源岩层为上震旦统和上古生界石炭―二叠系。
25. Layer bound characteristic of the mineral ore controlled by stratum and lithology being obvious.
    矿体受地层和岩性控制，具有明显的层控特点。
26. It means, the modern embryonic form of social stratum structure has formed.
    可以说，现代化的社会阶层结构的雏形已经形成。
27. The research of seismites mostly focuses on the marine stratum before Paleozoic.
    目前国内外学者对震积岩的研究主要集中在古生代以前的海相地层。
28. The population is divided into strata and a random sample is taken from each stratum.
    总体分成阶层后由各阶层抽选出来的随机样本。
29. This evolution is stratum accumulation but not replacement.
    这种演进是“层累”式的，而并非是“替换”式的。

noun

1. an abstract place usually conceived as having depth
   1. a good actor communicates on several levels
   2. a simile has at least two layers of meaning
   3. the mind functions on many strata simultaneously

   Synonym:    levellayer

2. people having the same social, economic, or educational status
   1. the working class
   2. an emerging professional class

   Synonym:    classsocial classsocio-economic class

3. one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)