原形：stratum复数：strata

The stratification in society is evident when we look at income levels across different strata.
社会分层在观察不同阶层的收入水平时表现得非常明显。
The stratum of soil varies in depth and composition from one location to another.
土壤层的深度和成分在不同的地点有所变化。
Stratums of sedimentary rocks form the geological foundation of the region.
沉积岩层构成了该地区的地质基础。
In the academic world, there are distinct strata of researchers, from junior faculty to full professors.
学术界中有明显的研究层次，从初级研究人员到正教授。
The stratagem was to distract the enemy while our troops moved into position.
策略是分散敌人的注意力，同时我们的部队进入阵地。
The stratification of education often results in unequal opportunities for students from different backgrounds.
教育分层常常导致来自不同背景的学生机会不均等。
Stratums of clouds can indicate changes in weather patterns.
云层的分层可以预示天气模式的变化。
In the military hierarchy, officers form a separate stratum from enlisted personnel.
在军事等级制度中，军官和士官形成不同的阶层。
Stratums of vegetation reflect the ecological diversity of an ecosystem.
植被层反映了生态系统的多样性。
The social scientist studied the class stratification in urban communities, focusing on income inequality.
社会科学家研究了城市社区的社会分层，特别是收入不平等的问题。