echelons的例句（echelons在句子中的用法）

• Officers were drawn largely from the top echelons of society. 这些官员大都来自社会上层。
• The upper echelons are ABs and the middle, BCs. 上层称为AB级,中层称为BC级.
• They are all northwest strikes , echelons and left - lateral strike - slips. 它们走向北西, 雁行斜列,左行走滑.
• They are also under - represented in the upper echelons of management. 她们只是上层管理梯队中的少数分子.
• ...the lower echelons of society. 社会等级较低的阶层