stratum

英 [ˈstrɑːtəm]

美 [ˈstreɪtəm]

n.  层; 岩层; 地层; 阶层

复数：strata　

TOEFLGRETEM8医学

Collins.1 / BNC.8071 / COCA.11902

牛津词典

noun

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

柯林斯词典

• N-COUNT 社会阶层
  Astratumof 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。
• N-COUNT 岩层
  Strataare 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。

英英释义

noun

• 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
• people having the same social, economic, or educational status
  1. the working class
  2. an emerging professional class
  Synonym:classsocial classsocio-economic class
• 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)

双语例句

• 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。
• 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。
• 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。
• Tramps are from the lowest stratum of society.
  流浪汉来自社会最下层。
• Let us choose a particular social stratum.
  让我们挑选某个特定的社会阶层。
• 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。
• They represent each society stratum.
  他们代表各个社会阶层。
• 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。
• 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。
• 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。