发布网友 发布时间:2022-04-22 13:01
共1个回答
热心网友 时间:2023-05-17 18:31
three tiers合适
stratum 1.层;地层;(生物的)组织层
We can follow the history of life through the strata.
我们可以通过这一层层的地层跟踪生命的历史.
2.社会阶层
Tramps are in a low stratum of society.
流浪汉生活在社会的下层.
layer 层;阶层;地层
A fine layer of st covers everything.
所有的东西都盖了一层薄薄的灰尘.
floor (楼房的)层
I live on the third floor.
我住在三楼.
tier 一层;一层褶裥
Her wedding cake had three tiers.
她的结婚蛋糕有三层.