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 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。
• 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。
• 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。
• Tramps are from the lowest stratum of society.
  流浪汉来自社会最下层。
• 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。
• 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。
• 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。
• 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；
• 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。
• 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。