名詞 echelon:

1. a body of troops arranged in a line
2. a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset

ech.e.lon

n.（名詞）

A formation of troops in which each unit is positioned successively to the left or right of the rear unit to form an oblique or steplike line.
梯隊(duì)：軍隊(duì)的一種隊(duì)形，其中每個(gè)編群都相繼排列在后一編群的左邊或右邊，形成斜線或梯形線
A flight formation or arrangement of craft in this manner.
梯形飛行隊(duì)：以此方式編排的飛行隊(duì)形
A similar formation of groups, units, or individuals.
梯形排列：群體、單位或個(gè)人的類似排列
A subdivision of a military or naval force:
陸軍或海軍的分部：
例句：
a command echelon.
司令部

A level of responsibility or authority in a hierarchy; a rank:
等級(jí)，階層：等級(jí)制中的權(quán)力或責(zé)任等級(jí)；階層：
例句：
a job in the lower echelon of the corporation.
一份公司底層工作

v.tr.intr.（及物動(dòng)詞和不及物動(dòng)詞）
ech.e.loned,ech.e.lon.ing,ech.e.lons
To arrange or take place in an echelon.
排成梯隊(duì)：排列成梯隊(duì)或以梯隊(duì)形式發(fā)生

來(lái)源：
French échelon
法語(yǔ) échelon
from Old French eschelon [rung of a ladder]
源自 古法語(yǔ) eschelon [梯級(jí)]
from eschiele [ladder]
源自 eschiele [梯子]
from Late Latin sc3la
源自 后期拉丁語(yǔ) sc3la
from Latin sc3lae [steps] * see skand-
源自 拉丁語(yǔ) sc3lae [級(jí)階] *參見(jiàn) skand-