stratum
英 ['strɑːtəm; 'streɪtəm]
美['stretəm]
	    - n. (组织的)层;[地质] 地层;社会阶层
 
考试真题
- Children grow up learning the skills to succeed in their socioeconomic stratum( 阶层) but not necessarily others.
 
出自-2017年6月阅读原文
- Children grow up learning the skills to succeed in their socioeconomic stratum (阶层) but not necessarily others.
 
2017年6月六级真题(第二套)阅读 Section B