echelon

阶层、级别、层级常用复数

Only the upper echelons of the company knew about the merger.

只有公司高层知道这桩并购案。

梯队、梯形队形军事

The fighter jets flew over the parade in echelon.

战斗机以梯形队形飞越阅兵现场。

排成梯队、成梯形排列正式

The tanks were echeloned along the ridge before dawn.

战车在黎明前沿著山脊排成梯队。