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

• Let us choose a particular social stratum.
  让我们挑选某个特定的社会阶层。
• 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 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。
• 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
• 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。
• 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。
• Theory of key stratum in ground control.
  岩层控制的关键层理论。
• 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。
• 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。
• 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。