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首页英语词典echelonechelon英英释意

echelon

英 ['eʃəlɒn; 'eɪʃ-] 美['ɛʃəlɑn]

英英释义实用场景例句

n. 梯形；梯次编队；梯阵；阶层
vi. 形成梯队
vt. 排成梯队

英英释意

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