stratum
n
(pl strata /-tE; -tE/)
1 any of a series of horizontal layers, esp of rock in the earth's crust 层; (尤指)岩层.
2 level or class in society (社会的)阶层
a gathering of people from a variety of social strata 不同社会阶层的人的集会.
🔁 扩展释义
*['streitәm]n. 层, 地层, 阶层【医】 层
🌿 同词根单词
striden. 大步,阔步;步幅;进展;一跨(的宽度);
vt.& vi. 大踏步走;跨过;
vi. 跨;
vt. 跨坐在…;