1
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。
层；地层
先理解核心含义，再看它在真实句子里的用法。
层；地层
a layer of material, such as rock or tissue, lying between other layers
This species is found in a different stratum of rock.
这个物种发现于不同的岩层中。
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.
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)
整层成分大致相同的沉积岩层
A layer of sedimentary rock having approximately the same composition throughout.
具有相同社会、经济或教育地位的人
people having the same social, economic, or educational status
The oldest fossil was found in the lowest stratum of rock in the valley.
最古老的化石是在山谷里最低的岩层中发现的。
AI contextual example
Scientists studied each stratum of the soil to learn about the area's history.
科学家们研究了每一层土壤，以了解该地区的历史。
AI contextual example
The cliff reveals several distinct strata formed over millions of years.
悬崖上露出了几层在数百万年间形成的不同的地层。
AI contextual example
the mind functions on many strata simultaneously
心灵同时在多个层面上运作。
WordNet
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。
介词in与stratum搭配，描述位置。
Fossils were preserved in the stratum.
化石保存在该地层中。
social stratum固定搭配，表示社会阶层。
They belong to a higher social stratum.
他们属于更高的社会阶层。
复数形式strata用于表示多个层次。
The study examines multiple strata of society.
该研究考察了社会的多个阶层。
Not this
Each strata of the atmosphere has different properties.
Use this
Each stratum of the atmosphere has different properties.
在英语中，'strata'是'stratum'的复数形式，不能用作单数。当表示一个层时，应该使用'stratum'。
Not this
There are many stratum in this geological formation.
Use this
There are many strata in this geological formation.
'Stratum'是可数名词，复数形式为不规则变化'strata'。表示多个层时需要使用复数形式'strata'。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
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。
上层
The upper stratum of society often has more opportunities.
社会上层往往有更多机会。
下层
Efforts were made to improve conditions in the lower stratum.
努力改善下层社会的条件。
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。
岩层
The geologist studied the rock stratum for signs of oil.
地质学家研究岩层寻找石油迹象。
不同阶层/不同地层
The survey sampled people from different strata of the population.
调查抽样了人口中不同阶层的人。
上层社会
Policies often favor the upper strata of society.
政策往往有利于社会上层。
下层社会
The lower strata struggle to access quality education.
下层社会难以获得优质教育。
来自社会各阶层
The festival attracted participants from all strata of society.
这个节日吸引了来自社会各阶层的参与者。
Use stratum naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
Stratum 中的 'stra' 像 'strip' 条纹，记忆地层是一层层的条纹。
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。
这些单词均以-um结尾，但重读音节不同，与stratum不押韵。
Dictionary facts from ECDICT, WIKTIONARY.