Word · Frequency #8071
stratum
层；地层
核心释义
a layer of material, such as rock or tissue, lying between other layers
- 1.
多个平行水平材料层中之一,层叠排列
One of several parallel horizontal layers of material arranged one on top of another.
- 2.
层层叠叠的平行材料层之一(如生物组织层或沉积岩层)
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)
- 3.
整层成分大致相同的沉积岩层
A layer of sedimentary rock having approximately the same composition throughout.
- 4.
具有相同社会、经济或教育地位的人
people having the same social, economic, or educational status
- 5.
大气层中呈层状分布的区域,如平流层
Any of the regions of the atmosphere, such as the stratosphere, that occur as layers.
- 6.
通常被认为有深度的抽象场所
an abstract place usually conceived as having depth
- 7.
组织层
A layer of tissue.
- 8.
由社会、文化或经济地位相似的人组成的社会阶层
A class of society composed of people with similar social, cultural, or economic status.
- 9.
植被层,通常高度相近
A layer of vegetation, usually of similar height.
- 10.
计算机时钟相对于网络中其他时钟的精确度级别
The level of accuracy of a computer's clock, relative to others on the network.
- 11.
语言的历史层次
A historical layer of a language.
多个平行水平材料层中之一,层叠排列；层层叠叠的平行材料层之一(如生物组织层或沉积岩层)；整层成分大致相同的沉积岩层；具有相同社会、经济或教育地位的人；大气层中呈层状分布的区域,如平流层
用法In use
The oldest fossil was found in the lowest stratum of rock in the valley.
用法提示：stratum 在此指一层岩石地层，作名词。
Scientists studied each stratum of the soil to learn about the area's history.
用法提示：stratum 表示平行的物质层，这里指土层。
The cliff reveals several distinct strata formed over millions of years.
用法提示：这里用复数形式 strata，指多层岩石或沉积层。
the mind functions on many strata simultaneously
stratum of [noun]
表示具体层次时常用此结构，后接名词说明层次类型。
This species is found in a different stratum of rock.
这个物种发现于不同的岩层中。
相关词与表达Connections
搭配Collocations
- social stratum
- 社会阶层
- People from every social stratum attended the conference.来自各个社会阶层的人都参加了会议。
- upper stratum
- 上层
- The upper stratum of society often has more opportunities.社会上层往往有更多机会。
- lower stratum
- 下层
- Efforts were made to improve conditions in the lower stratum.努力改善下层社会的条件。
- sedimentary stratum
- 沉积地层
- The sedimentary stratum revealed fossils of ancient marine life.沉积地层揭示了古代海洋生物的化石。
- rock stratum
学习提示Learner notes
记忆技巧Memory Tip
Stratum 中的 'stra' 像 'strip' 条纹，记忆地层是一层层的条纹。
语境与语域Context & Register
多用于地质学（地层）和社会学（社会阶层）领域，正式书面语，中性偏专业。在生物学中也指组织层，但使用较少。通常不用于日常口语。
发音与拼写Pronunciation & Spelling
这些单词均以-um结尾，但重读音节不同，与stratum不押韵。
用法优先级Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
一起学习词形Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.