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stratum  
添加到生字筆記
KK:[ˈstrеtǝm] DJ:[ˈstrеitǝm]

名複: strata  stratums  

權威釋義

n.[C]

  1. 層；地層；（生物的）組織層
  2. 社會階層

辨析

同義參見:

bed vein layer

以上來源於：《英漢大辭典》

/ˈstrɑːtəm, ˈstreɪtəm/

n.

(pl. strata /-tə/ )
  1. a layer or a series of layers of rock.
  2. a thin layer within any structure.
  3. a level or class of society.

Usage

In English, as in the original Latin, stratum is singular and its plural form is strata. It is therefore incorrect to use strata as a singular or to create the form stratas as the plural: a series of overlying strata not a series of overlying stratas, and a new stratum was uncovered not a new strata was uncovered.

Etymology

C16: mod. L., from L., lit. ‘something spread or laid down’, neut. past part. of sternere ‘strew’.

以上來源於：《簡明牛津英語詞典》