echeloned的翻译，读音
释义：
(echelon 的过去时) n. 梯形, 梯阵, 梯次编队
vt. 排成梯队
vi. 形成梯队
past tense of echelon
n. a body of troops arranged in a line
n. a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
vt. 排成梯队
vi. 形成梯队
past tense of echelon
n. a body of troops arranged in a line
n. a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset