二级下层的英文

• upper tier ii

• 二级:    two stage; two level; second ...
• 下层:    lower levels
• 下层:    1.(指机构 、 组织) lower levels 深入下层 go to lower-level units; go down to the grassroots level2.(指阶层) lower strata; sublayer 下层社会的人们 people of a lower social grade; 迎合中产阶级的最下层 cater for the humblest strata of the middle class; 流浪汉来自社会最下层。 tramps are from the lowest stratum of society.3.[生物学] substratum; substory; 下层结构 understructure; 下层社会 lower classes; 下层土 sole
• 二级:    two stage; two level; second level; secondary; second 这船列入二级。the ship rates as second
• 分级下脚毛:    locks