stratum

英['strɑːtəm]美['streɪtəm]
  • n. 地层；阶层

    • 记忆方法

    词源记忆法
    来自拉丁语stratum，展开物，覆盖，铺盖，道路，中性格于stratus，展开，展开的，铺开的，过去分词格于sternere，展开，铺开，伸展，来自PIE*ster，展开，伸展，词源同strew，street.后用于科学术语指岩层，地层等。
      noun(名词)
      1. 部分；层；阶层
      2. 层;岩层;地层

    双解例句

    noun(名词)
    1. 部分；层；阶层

      The report shows that drugs have penetrated every stratum of American society.

      报告显示，毒品已经渗入美国社会的各个阶层。

    2. 层;岩层;地层

      The cliffs are characterized by remarkable zigzagging strata of shale and sandstone.

      这些悬崖的特征是它们由一层层清晰易辨的页岩、石灰岩和砂岩交错构成。

    小知识

    A stratum is a layer of something, whether abstract, like a social stratum composed of only billionaires, or physical, like the different strata (that’s the plural version) of clouds that an airplane passes through.

    Stratum comes from the Latin meaning “something that has been laid down,” like asphalt or a bedsheet, but we generally use it to describe layers of something. If you go into geology, you will probably investigate different strata of the soil. If you start out in life poor and try to become rich, you are trying to get into a different social stratum.

    实用短语

    1. stratum corneum

      角质层,角层,角化层,层状角质

    2. non-access stratum

      非接入层,非接入层面

    3. stratum granulosum

    4. bearing stratum

      持力层,

    5. stratum basale

    6. stratum lucidum

    7. stratum spinosum

    8. ply stratum

      底层布料

    9. stratum germinativum

    常用短语

    1. stratum corneum

      角质层；角层；角化层

    2. bearing stratum

      ［工程］承重层

    单词用法

    词组短语
    stratum corneum角质层；角层；角化层；bearing stratum［工程］承重层

    词根词缀

    词根: strat

    =spread out,表示”扩散,引申为'层次'”,

    • adj.

      substratal 基础的,基本的,根本的

      sub下面+strat扩散,引申为'层次'+al……的→下面一层→基础的

    • n.

      strata 地层,层

      stratum[[n.[地] 地层, [生]组织的层, 社会阶层]]母词鷑.地层,层

      stratum [地] 地层, [生]组织的层, 社会阶层

      strat扩散,引申为'层次'+um→n.[地] 地层, [生]组织的层, 社会阶层

      substrate 底层,下层,[地]底土层

      sub下面+strat扩散,引申为'层次'+e→n.底层,下层,[地]底土层

    • v.

      prostrate 平放,征服,使…衰弱;俯卧

      pro前+strat扩散,引申为'层次'+e→前后同一个层次上→俯卧

      stratify [使]层化

      strat扩散,引申为'层次'+ify化→v.[使]层化

    同义词

    layer  /  bed  /  vein

    同根词

    词根：stratum

    adj.

    stratified分层的；形成阶层的；分为不同等级的

    n.

    stratigraphy地层学；地层中的岩石组成

    v.

    stratified使成层（stratify的过去分词）

    vi.

    stratify分层；成层；阶层化

    vt.

    stratify分层；成层；使形成阶层